could someone please tell me where I'm wrong... ??

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  This is the code where the question is:

  package project;
  
  import java.awt.BorderLayout;
  import java.awt.Color;
  import java.awt.Font;
  import java.awt.FontMetrics;
  import java.awt.Graphics;
  import java.awt.GridBagConstraints;
  import java.awt.GridBagLayout;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import javax.swing.ButtonGroup;
  import javax.swing.JButton;
  import javax.swing.JCheckBox;
  import javax.swing.JFrame;
  import javax.swing.JLabel;
  import javax.swing.JPanel;
  import javax.swing.JRadioButton;
  import javax.swing.JTextField;
  import javax.swing.SwingConstants;
  
  public class UserInterface extends JPanel
  {
  //    private JTextField orb1ChargeDensityTextField; // don't remember what I have this for or if it's a mistake
  //    private JTextField orb2ChargeDensityTextField; // don't remember what I have this for or if it's a mistake
      private JFrame frame;
      private JTextField orb1ChargeTextField;
      private JTextField orb2ChargeTextField;
      private JTextField orb1InitialVelocityTextField;
      private JTextField orb2InitialVelocityTextField;
      private JTextField gravityConstantTextField;
      private JCheckBox considerGravity;
      private JCheckBox considerElectricity;
      private JRadioButton inVacuumRadioButton;
      private JRadioButton inAirRadioButton;
      private JRadioButton inOtherMediumRadioButton;
      private JPanel graphicsPanel = this;
      private JPanel buttonsPanel;
      private Orb orb1;
      private Orb orb2;
      private boolean regularComponentsAdded = false;
      private JLabel orb1InitialVelocityLabel;
      private JLabel orb2InitialVelocityLabel;
      private JLabel orb1ChargeLabel;
      private JLabel orb2ChargeLabel;
      private JLabel gravityConstantLabel;
  //    private JPanel orb1InitialVelocityPanel;
  //    private JPanel orb2InitialVelocityPanel;
  //    private JPanel gravityConstantPanel;
      private JButton simulateButton;
      private GridBagConstraints c;
      private boolean simulationStarted = false;
      private Common common = new Common();
      private JLabel planetaryRadiusLabel;
      private JTextField planetaryRadiusTextField;
      private JLabel planetaryMassLabel;
      private JTextField planetaryMassTextField;
      private JLabel dielectricConstantPanel;
      private JTextField dielectricConstantTextField;
      private JLabel orb1HeightLabel;
      private JLabel orb2HeightLabel;
      private JTextField orb1HeightTextField;
      private JTextField orb2HeightTextField;
      private JLabel separationDistanceLabel;
      private JTextField separationDistanceTextField;
      private JLabel dragCoefficientLabel;
      private JTextField dragCoefficientTextField;
      private JLabel orb1RadiusLabel;
      private JTextField orb1RadiusTextField;
      private JLabel orb2RadiusLabel;
      private JTextField orb2RadiusTextField;
  
      public UserInterface()
      {
          createPanels();
          createOrbs();
          setLabelProperties();
          setTextFieldProperties();
          setCheckBoxProperties();
          setRegularButtonProperties();
          setRadioButtonProperties();
          setPanelProperties();
          setFrameProperties();
      }
  
      public void setLabelProperties()
      {
          orb1InitialVelocityLabel = new JLabel("First orb's initial velocity (m/s): ");
          orb1InitialVelocityLabel.setVerticalAlignment(SwingConstants.TOP);
          orb2InitialVelocityLabel = new JLabel("Second orb's initial velocity (m/s): ");
          orb2InitialVelocityLabel.setVerticalAlignment(SwingConstants.TOP); // CHECK!!!
          orb1ChargeLabel = new JLabel("First orb's charge (C): ");
          orb2ChargeLabel = new JLabel("Second orb's charge (C): ");
          gravityConstantLabel = new JLabel("Gravity constant (m/s^2): ");
          planetaryRadiusLabel = new JLabel("Planetary radius (m): ");
          planetaryMassLabel = new JLabel("Planetary mass (kg): ");
          dielectricConstantPanel = new JLabel("Dielectric constant: ");
          orb1HeightLabel = new JLabel("First orb's height (m): ");
          orb2HeightLabel = new JLabel("Second orb's height (m): ");
          separationDistanceLabel = new JLabel("Separation distance (m): ");
          dragCoefficientLabel = new JLabel("Drag coefficient: ");
          orb1RadiusLabel = new JLabel("First orb's radius (m): ");
          orb2RadiusLabel = new JLabel("Second orb's radius (m): ");
      }
  
      public void setPanelProperties() // layout needs some serious fixing!!!
      {
          if(!regularComponentsAdded)
          {
              // Initial GridBagLayout settings
              c = new GridBagConstraints();
              c.anchor = GridBagConstraints.FIRST_LINE_START;
              c.weighty = 0; //etho
              c.fill = GridBagConstraints.HORIZONTAL;
              c.gridheight = 1; // is for the the specific component when adding - not height for all components together
  
              buttonsPanel.setSize(400, 200);
              buttonsPanel.setLayout(new GridBagLayout());
  
              buttonsPanel.setBackground(Color.CYAN);
              graphicsPanel.setBackground(Color.GREEN);
  
              c.gridx = 1; c.gridy = 1;
              buttonsPanel.add(considerElectricity, c);
              considerElectricity.setBackground(Color.YELLOW);
  
              c.gridx = 2; c.gridy = 1;
              buttonsPanel.add(considerGravity, c);
  
              c.gridx = 1; c.gridy = 2; c.gridwidth = 1; c.weighty = 0; // etho
              buttonsPanel.add(orb1InitialVelocityLabel, c);
  
              c.gridx = 2; c.gridy = 2;
              buttonsPanel.add(orb1InitialVelocityTextField, c);
  
              c.gridx = 1; c.gridy = 3;
              buttonsPanel.add(orb2InitialVelocityLabel, c);
  
              c.gridx = 2; c.gridy = 3;
              buttonsPanel.add(orb2InitialVelocityTextField, c);
  
              c.gridx = 1; c.gridy = 5; c.gridwidth = 1;
              buttonsPanel.add(gravityConstantLabel, c);
              c.gridx = 2; c.gridy = 5;
              buttonsPanel.add(gravityConstantTextField, c);
  
              c.gridx = 1; c.gridy = 6;
              buttonsPanel.add(orb1ChargeLabel, c);
  
              c.gridx = 2; c.gridy = 6;
              buttonsPanel.add(orb1ChargeTextField, c);
  
              c.gridx = 1; c.gridy = 7;
              buttonsPanel.add(orb2ChargeLabel, c);
  
              c.gridx = 2; c.gridy = 7;
              buttonsPanel.add(orb2ChargeTextField, c);
  
              c.gridx = 1; c.gridy = 8;
              buttonsPanel.add(planetaryRadiusLabel, c);
  
              c.gridx = 2; c.gridy = 8;
              buttonsPanel.add(planetaryRadiusTextField, c);
  
              c.gridx = 1; c.gridy = 9;
              buttonsPanel.add(planetaryMassLabel, c);
  
              c.gridx = 2; c.gridy = 9;
              buttonsPanel.add(planetaryMassTextField, c);
  
              c.gridx = 1; c.gridy = 10;
              buttonsPanel.add(dielectricConstantPanel, c);
  
              c.gridx = 2; c.gridy = 10;
              buttonsPanel.add(dielectricConstantTextField, c);
  
              c.gridx = 1; c. gridy = 11;
              buttonsPanel.add(orb1HeightLabel, c);
  
              c.gridx = 2; c.gridy = 11;
              buttonsPanel.add(orb1HeightTextField, c);
  
              c.gridx = 1; c.gridy = 12;
              buttonsPanel.add(orb2HeightLabel, c);
  
              c.gridx = 2; c.gridy = 12;
              buttonsPanel.add(orb2HeightTextField, c);
  
              c.gridx = 1; c.gridy = 13;
              buttonsPanel.add(separationDistanceLabel, c);
  
              c.gridx = 2; c.gridy = 13;
              buttonsPanel.add(separationDistanceTextField, c);
  
              c.gridx = 1; c.gridy = 14;
              buttonsPanel.add(dragCoefficientLabel, c);
  
              c.gridx = 2; c.gridy = 14;
              buttonsPanel.add(dragCoefficientTextField, c);
  
              c.gridx = 1; c.gridy = 15;
              buttonsPanel.add(orb1RadiusLabel, c);
  
              c.gridx = 2; c.gridy = 15;
              buttonsPanel.add(orb1RadiusTextField, c);
  
              c.gridx = 1; c.gridy = 16;
              buttonsPanel.add(orb2RadiusLabel, c);
  
              c.gridx = 2; c.gridy = 16;
              buttonsPanel.add(orb2RadiusTextField, c);
  
              c.gridx = 1; c.gridy = 17;
              buttonsPanel.add(inVacuumRadioButton, c);
  
              c.gridx = 1; c.gridy = 18;
              buttonsPanel.add(inAirRadioButton, c);
  
              c.gridx = 1; c.gridy = 19; c.weighty = 1;
              buttonsPanel.add(inOtherMediumRadioButton, c);
  
              c.gridx = 1; c.gridy = 20; c.weighty = 0; c.gridwidth = 2;
              buttonsPanel.add(simulateButton, c);
  
          }
          if(considerElectricity.isSelected())
          {
              orb1ChargeLabel.setVisible(true);
              orb1ChargeTextField.setVisible(true);
              orb2ChargeLabel.setVisible(true);
              orb2ChargeTextField.setVisible(true);
              dielectricConstantPanel.setVisible(true);
              dielectricConstantTextField.setVisible(true);
              orb1HeightLabel.setVisible(true);
              orb2HeightLabel.setVisible(true);
              orb1HeightTextField.setVisible(true);
              orb2HeightTextField.setVisible(true);
              separationDistanceLabel.setVisible(true);
              separationDistanceTextField.setVisible(true);
              dragCoefficientLabel.setVisible(true);
              dragCoefficientTextField.setVisible(true);
              orb1RadiusLabel.setVisible(true);
              orb2RadiusLabel.setVisible(true);
              orb1RadiusTextField.setVisible(true);
              orb2RadiusTextField.setVisible(true);
          }
          else
          {
              orb1ChargeLabel.setVisible(false);
              orb1ChargeTextField.setVisible(false);
              orb2ChargeLabel.setVisible(false);
              orb2ChargeTextField.setVisible(false);
              dielectricConstantPanel.setVisible(false);
              dielectricConstantTextField.setVisible(false);
              separationDistanceLabel.setVisible(false);
              separationDistanceTextField.setVisible(false);
              dragCoefficientLabel.setVisible(false);
              dragCoefficientTextField.setVisible(false);
              orb1RadiusLabel.setVisible(false);
              orb2RadiusLabel.setVisible(false);
              orb1RadiusTextField.setVisible(false);
              orb2RadiusTextField.setVisible(false);
          }
          if(considerGravity.isSelected())
          {
              gravityConstantLabel.setVisible(true);
              gravityConstantTextField.setVisible(true);
              planetaryRadiusLabel.setVisible(true);
              planetaryRadiusTextField.setVisible(true);
              planetaryMassLabel.setVisible(true);
              planetaryMassTextField.setVisible(true);
              orb1HeightLabel.setVisible(true);
              orb1HeightTextField.setVisible(true);
              orb2HeightLabel.setVisible(true);
              orb2HeightTextField.setVisible(true);
          }
          else
          {
              gravityConstantLabel.setVisible(false);
              gravityConstantTextField.setVisible(false);
              planetaryRadiusLabel.setVisible(false);
              planetaryRadiusTextField.setVisible(false);
              planetaryMassLabel.setVisible(false);
              planetaryMassTextField.setVisible(false);
              orb1HeightLabel.setVisible(false);
              orb1HeightTextField.setVisible(false);
              orb2HeightLabel.setVisible(false);
              orb2HeightTextField.setVisible(false);
          }
  //        buttonsPanel.add(orb1ChargeDensityTextField); // don't remember what I have this for or if it's a mistake
  //        buttonsPanel.add(orb2ChargeDensityTextField); // don't remember what I have this for or if it's a mistake
  //        frame.pack();
          buttonsPanel.validate(); // THIS SEEMS TO NOT BE NEEDED BUT KEEP IT UNTIL I LOOK FURTHER INTO THIS!!!
          buttonsPanel.setVisible(true);
  
  //        System.out.println("The width is: " + buttonsPanel.getWidth()); // here for testing purposes
      }
  
      public void setRadioButtonProperties()
      {
          inVacuumRadioButton = new JRadioButton("Vacuum");
          inAirRadioButton = new JRadioButton("Air");
          inOtherMediumRadioButton = new JRadioButton("Other");
          inVacuumRadioButton.setSelected(true);
  
          ButtonGroup group = new ButtonGroup();
          group.add(inVacuumRadioButton);
          group.add(inAirRadioButton);
          group.add(inOtherMediumRadioButton);
      }
  
      public void setRegularButtonProperties()
      {
          simulateButton = new JButton("Simulate");
  
          simulateButton.addActionListener(new ActionListener()
          {
              public void actionPerformed(ActionEvent e)
              {
                  // The following is test code and is not the real deal type of simulation
                  orb1.setX(0); simulationStarted = true;
  //                Timer timer = new Timer(100, new Repaint());
              }
          });
      }
  
  //    public class Repaint implements ActionListener
  //    {
  //        public void actionPerformed(ActionEvent e)
  //        {
  //            repaint();
  //        }
  //    }
  
      public void createPanels()
      {
          buttonsPanel = new JPanel();
      }
  
      public void createOrbs()
      {
          orb1 = new Orb();
          orb2 = new Orb();
      }
  
      protected void paintComponent(Graphics g)
      {
          super.paintComponent(g);
          drawTitle(g);
          // THE FOLLOWING IS DATA CALCULATED AND SHOVED INTO THE ORB CLASS BEING USED
          g.setColor(Color.RED);
          orb1.setX(0.03F); orb1.setY(0.1F); // temporary for testing purposes
          if(orb1RadiusTextField.getText() != null)
              orb1.setRadius(Float.parseFloat(orb1RadiusTextField.getText()));
          else
              orb1.setRadius(0.3F);
          System.out.println("The nummber is this: " + Float.parseFloat(orb1RadiusTextField.getText()));
          g.fillOval(getPixelXCoordinate(orb1.getX()), getPixelYCoordinate(orb1.getY()), convertMetresToPixels(orb1.getRadius()), convertMetresToPixels(orb1.getRadius()));
      }
  
      public int convertMetresToPixels(double metres)
      {// This method only converts metres to pixels and does not take into account where the pixels are drawn
          int pixels = -1;
          int scalar = 3000;
          pixels = (int) (scalar*metres);
          return pixels;
      }
  
      public int getPixelXCoordinate(double metresXCoordinate)
      {
          return convertMetresToPixels(metresXCoordinate);
      }
  
      public int getPixelYCoordinate(double metresYCoordinate)
      {
          return (int) (frame.getHeight() - convertMetresToPixels(metresYCoordinate));
      }
  
      public void drawTitle(Graphics g) // There's an issue with the delay from normal/unformatted text to special/formatted text
      {
          String title = "Welcome to the orb program!";
          FontMetrics fontMetrics = g.getFontMetrics();
          graphicsPanel.setFont(new Font("Times", Font.BOLD, 20));
  
          // Get the position of the leftmost character in the baseline
          int x = fontMetrics.stringWidth(title);
          int y = fontMetrics.getAscent();
  
          //
          g.drawString(title, x, y);
  
          // Nullify unused references for garbage collector
          fontMetrics = null;
          title = null;
      }
  
      public void setFrameProperties()
      {
          frame = new JFrame();
          frame.setTitle("Orb program");
          frame.setVisible(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setSize(1100, 800); // change resolution in conjunction with FontMetrics title placement
          frame.setLocationRelativeTo(null);
          frame.setLayout(new BorderLayout());
  //        frame.add(buttonsPanel); // uncomment this later
          frame.add(graphicsPanel);
          frame.add(buttonsPanel, BorderLayout.EAST);
      }
  
      public void setCheckBoxProperties()
      {
          considerGravity = new JCheckBox("Enable gravity", false);
          considerGravity.addActionListener(new ActionListener()
          {
              public void actionPerformed(ActionEvent e)
              {
                  setPanelProperties();
              }
          });
  
          considerElectricity = new JCheckBox("Enable electrical forces", true);
          considerElectricity.addActionListener(new ActionListener()
          {
              public void actionPerformed(ActionEvent e)
              {
                  setPanelProperties();
              }
          });
      }
  
      public void setTextFieldProperties()
      {
          float tempElementaryCharge = common.getElementaryCharge();
          gravityConstantTextField = new JTextField("9.79205");
          orb1ChargeTextField = new JTextField(String.valueOf(tempElementaryCharge));
          orb2ChargeTextField = new JTextField(String.valueOf(-1 * tempElementaryCharge));
          orb1InitialVelocityTextField = new JTextField("0");
          orb2InitialVelocityTextField = new JTextField("0");
          planetaryRadiusTextField = new JTextField("6.3685E6");
          planetaryMassTextField = new JTextField("5.9721986E24");
          dielectricConstantTextField = new JTextField("1.00058986");
          orb1HeightTextField = new JTextField("1");
          orb2HeightTextField = new JTextField("1");
          separationDistanceTextField = new JTextField("1");
          dragCoefficientTextField = new JTextField("0.47");
          orb1RadiusTextField = new JTextField("0.03");
          orb2RadiusTextField = new JTextField("CACA2");
  
  //        orb1ChargeDensityTextField = new JTextField(""); // don't remember what I have this for or if it's a mistake
  //        orb2ChargeDensityTextField = new JTextField(""); // don't remember what I have this for or if it's a mistake
      }
  
  //    public String getOrb1Initial // I WAS HERE LAST!!!!
  
      public static void main(String[] args) // main() will be removed later
      {
          UserInterface userInterface = new UserInterface(); // this will later be called via the main() of the launcher program
      }
  }

  (Just so that can compile the program here)

  /*
   * To change this template, choose Tools | Templates
   * and open the template in the editor.
   */
  
  package project;
  
  /**
   *
   * @author Deniz
   */
  
  public class Common
  {
      private float coulombConstant = (float) 8.9875517873681764E9; // Nm^2/C^2
      private float newtonGravitationalConstant = (float) 6.67428E-11; // Nm^2/kg^2
      private float planetaryMass = (float) 5.9721986E24; // (in kg) defaults to Earth's mass
      private float dielectricConstant = (float) 1.00058986; // dimensionless
      private float planetaryRadius;
      private float height;
      private float systemImpulse;
      private final float airDensityEarth = (float) 1.29; // in kg/m^3 // THIS NUMBER COULD BE WRONG
      private float mediumDragForce;
      private final float airDensityMars = (float) 2.30446139E-5; // g/(cm^3)
      private float gravityConstant; // = (float) 9.80665; // in m/s^2 // set it via text field instead of here by default
      private float mediumDensity; // also called fluid density
      private float separationDistance; // m
      private float electricalPotentialEnergy;
      private double electricField;
      private double gravitationalPotentialEnergy;
      private double totalKineticEnergy;
      private double totalPotentialEnergy;
      private boolean inVacuum = true; // should make it get from text field - check my logic again jic
  //    private float potentialDifference; // I'M PRETTY SURE THIS IS FOR V = ED AND V = ED IS FOR UNIFORM ELECTRIC FIELDS AND THIS PROGRAM DOESN'T SIMULATE SOMETHING WITH A UNIFORM ELECTRIC FIELD
      private boolean inAir = false; // should make it get from text field - check my logic again jic
      private boolean inOtherMedium = false; // neglect any additional electrical properties that MIGHT exist(depending on the fluid in question)
      private final float elementaryCharge = (float) 1.6E-19;
  
      public Common()
      {
  
      }
  
      public float getElementaryCharge()
      {
          return elementaryCharge;
      }
  
      public double getSeparationDistance()
      {
          return separationDistance;
      }
  
      public float getSystemImpulse()
      {
          return systemImpulse;
      }
  
      public float getElectricalPotentialEnergy()
      {
          return electricalPotentialEnergy;
      }
  
      public double getElectricField()
      {
          return electricField;
      }
  
      public float getMediumDragForce()
      {
          if(inVacuum)
          {
              return 0;
          }
          else
          {
              return mediumDragForce;
          }
      }
  
      public void setSeparationDistance(Orb orb1, Orb orb2, float surfaceSeparation)
      {
          separationDistance = surfaceSeparation + orb1.getRadius() + orb2.getRadius();
      }
  
      public void setMediumDragForce(float mediumDragForce)
      {
          this.mediumDragForce = mediumDragForce;
      }
  
      public void setMediumDragForce(float mediumDensity, double velocity, float referenceArea, float dragCoefficient)
      {
          mediumDragForce = (float) (-0.5 * mediumDensity * referenceArea * dragCoefficient * Math.pow(velocity, 2)); // haven't paid too much attention to direction of the vector yet
      }
  
      public void setMediumDensity(float mediumDensity)
      {
          this.mediumDensity = mediumDensity;
      }
  
  //    public void setSeparationDistance(Point point)
  //    {
  //
  //    }
  
      public void setSystemImpulse(float systemImpulse)
      {
          this.systemImpulse = systemImpulse;
      }
  
      public float getGravityConstant()
      {
          if(gravityConstant > 9.7 && gravityConstant < 9.9)
          {
              return gravityConstant;
          }
          else
          {
              gravityConstant = (float) (newtonGravitationalConstant * planetaryMass/Math.pow((planetaryRadius + height),2));
              return gravityConstant;
          }
      }
  
      public double getGravitationalPotentialEnergy()
      {
         return gravitationalPotentialEnergy;
      }
  
      public double getTotalKineticEnergy()
      {
          return totalKineticEnergy;
      }
  
      public double getTotalPotentialEnergy()
      {
          return totalPotentialEnergy;
      }
  
  //    public float getPotentialDifference()
  //    {
  //        return potentialDifference;
  //    }
  
      public void setGravityConstant(float gravityConstant)
      {
          this.gravityConstant = gravityConstant;
      }
  }

  (Just so that can compile the program here)

  /*
   * To change this template, choose Tools | Templates
   * and open the template in the editor.
   */
  
  package project;
  
  import java.awt.Point;
  
  /**
   *
   * @author Deniz
   */
  public class Orb
  {
      private boolean fixedOrbPosition = false;
      private float currentVelocity;
      private float currentSpeed;
      private float orbArea;
      private double charge;
      private double mass;
      private Point position;
      private float x;
      private float y;
      private double initialVelocity;
      private double intialSpeed;
      private float chargeDensity;
      private float potential;
      private float gamma; // in order to implement relativistic linear momentum
      private float initialMomentum;
      private float finalMomentum;
      private float impulse;
      private float radius;
      private final float sphereDragCoefficient = 0.47F;
      private float weight;
  
      public Orb()
      {
  
      }
  
      public float getWeight()
      {
          return weight;
      }
  
      public float getRadius()
      {
          return radius;
      }
  
      public void setRadius(float radius)
      {
          this.radius = radius;
      }
  
      public double getSpeed()
      {
          return currentSpeed;
      }
  
      public double getVelocity()
      {
          return currentVelocity;
      }
  
      public double getPotential()
      {
          return potential;
      }
  
      public double getCharge()
      {
          return charge;
      }
  
      public float getChargeDensity()
      {
          return chargeDensity;
      }
  
      public float getInitialMomentum()
      {
          return initialMomentum;
      }
  
      public float getFinalMomentum()
      {
          return finalMomentum;
      }
  
      public float getImpulse()
      {
          return impulse;
      }
  
      public double getMass()
      {
          return mass;
      }
  
      public Point getPosition()
      {
          return position;
      }
  
      public float getX()
      {
          return x;
      }
  
      public float getY()
      {
          return y;
      }
  
      public void setInitialVelocity(double initialVelocity)
      {
          this.initialVelocity = initialVelocity;
      }
  
      public void setImpulse(float impulse)
      {
          this.impulse = impulse;
      }
  
      public void setInitialMomentum(float initialMomentum)
      {
          this.initialMomentum = initialMomentum;
      }
  
      public void setVelocity(float currentVelocity)
      {
          this.currentVelocity = currentVelocity;
      }
  
      public void setSpeed(float currentSpeed)
      {
          this.currentSpeed = currentSpeed;
      }
  
      public void setFinalMomentum(float finalMomentum)
      {
          this.finalMomentum = finalMomentum;
      }
  
      public void setX()
      {
          // THIS ONE SHOULD OBTAIN ITS DATA FROM A JTEXTFIELD!!!
      }
  
      public void setX(float currentX)
      {
          this.x = currentX;
      }
  
      public void setY()
      {
          // THIS ONE SHOULD OBTAIN ITS DATA FROM A JTEXTFIELD!!!
      }
  
      public void setY(float currentY)
      {
          this.y = currentY;
      }
  
      public void setCharge(double charge)
      {
          this.charge = charge;
      }
  
      public void setChargeDensity(float chargeDensity)
      {
          this.chargeDensity = chargeDensity;
      }
  
      public void setMass(float mass)
      {
          this.mass = mass;
      }
  
      public void setPosition(Point position)
      {
          this.position = position;
      }
  
      public void setPosition(int x, int y)
      {
          this.x = x;
          this.y = y;
      }
  }

  Thanks in advance!

  Because you keep changing the font of drawTitle(), which causes another paint event.

  You also break a primary rule of the paintComponent() that is specified in the Javadoc. You are not supposed to make permanent changes to the provided GraphicsContext. If you need to change, you are supposed to copy it.

  Also that:

          // Nullify unused references for garbage collector
          fontMetrics = null;
          title = null;
  

  is nonsense. Local variables are about to go in any case out of reach. Don't waste your time with this.

• could someone please tell me how to stop pop ups netbits (ad served by netbits). I have tried everything what it that I can think of, all to nothing done.

  some of the things I've tried:-spybot, anti-malware, avast. I even downloaded 'explorer processes' off the system restore, rebooted in safe mode, suspension winlogon.exe and explorer.exe and replay all my anti spy/malware/adblocker programs... nothing works and it leads me around the twist. can anyone help with this please. Edit

  Hello
  I think I have the answer. You go in my computer and then go to uninstall/change a program in Windows 7/Vista. XP would be in the control panel. Then you scroll down until you see the following entry: "Netbits contextual Tracking. Click it and then click on uninstall it / edit button. This should remove these pesky ads from popping up.

• Hello could someone please tell me how served pack 2

  I served a pack but need served pack 2 on my vista windiws

  You should be able to get if Windows Update (easiest) or from:

  http://windows.microsoft.com/en-US/windows/downloads/service-packs .

• my freezer scandisk to 0% at the start of the computer. someone please tell me how to solve this problem

  my freezer scandisk to 0% at the start of the computer. someone please tell me how to solve this problem, and for this reason, I can't use my computer for other things as well. It is now very slow and do not file load. as adobe flashplayer doesn't load on google crome more please help me with this. I have windows xp sp2

  Yes, install xp3, the patch is only for hp AND amd pc, install from the link and then navigate to the microsoft updates and a priority scan, install, then do a custom scan and install rootkit updates, it will be a long process that you are behind in security updates , \\

  clean the pc then do the following:

  Shenan Stanley tips: will probably want to clean this machine...

   

  Search for malware:

  Download, install, execute, update and perform analyses complete system with the two following applications:

  ·                                 MalwareBytes (FREE)

  ·                                 SuperAntiSpyware (FREE)

  Remove anything they find. Reboot when necessary. (You can uninstall one or both when finished.)

  Search online with eSet Online Scanner.

  The less you have to run all the time, most things you want to run will perform:

  Use Autoruns to understand this all starts when your computer's / when you log in. Look for whatever it is you do not know usingGoogle (or ask here.) You can hopefully figure out if there are things from when your computer does (or connect) you don't not need and then configure them (through their own built-in mechanisms is the preferred method) so they do not - start using your resources without reason.

  You can download and use Process Explorer to see exactly what is taking your time processor/CPU and memory. This can help you to identify applications that you might want to consider alternatives for and get rid of all together.

  Do a house cleaning and the dust of this hard drive:

  You can free up disk space (will also help get rid of the things that you do not use) through the following steps:

  Windows XP should take between 4.5 and 9 GB * with * an Office suite, editing Photo software, alternative Internet browser (s), various Internet plugins and a host of other things installed.

  If you are comfortable with the stability of your system, you can delete the uninstall of patches which has installed Windows XP...
  http://www3.TELUS.NET/dandemar/spack.htm
  (Especially of interest here - #4)
  (Variant: http://www.dougknox.com/xp/utils/xp_hotfix_backup.htm )

  You can run disk - integrated into Windows XP - cleanup to erase everything except your last restore point and yet more 'free '... files cleaning

  How to use disk cleanup
  http://support.Microsoft.com/kb/310312

  You can disable hibernation if it is enabled and you do not...

  When you Hibernate your computer, Windows saves the contents of the system memory in the hiberfil.sys file. As a result, the size of the hiberfil.sys file will always be equal to the amount of physical memory in your system. If you don't use the Hibernate feature and want to reclaim the space used by Windows for the hiberfil.sys file, perform the following steps:

  -Start the Control Panel Power Options applet (go to start, settings, Control Panel, and then click Power Options).
  -Select the Hibernate tab, uncheck "Activate the hibernation", and then click OK. Although you might think otherwise, selecting never under "Hibernate" option on the power management tab does not delete the hiberfil.sys file.
  -Windows remove the "Hibernate" option on the power management tab and delete the hiberfil.sys file.

  You can control the amount of space your system restore can use...

  1. Click Start, right click my computer and then click Properties.
  2. click on the System Restore tab.
  3. highlight one of your readers (or C: If you only) and click on the button "settings".
  4 change the percentage of disk space you want to allow... I suggest moving the slider until you have about 1 GB (1024 MB or close to that...)
  5. click on OK. Then click OK again.

  You can control the amount of space used may or may not temporary Internet files...

  Empty the temporary Internet files and reduce the size, that it stores a size between 64 MB and 128 MB...

  -Open a copy of Microsoft Internet Explorer.
  -Select TOOLS - Internet Options.
  -On the general tab in the section 'Temporary Internet files', follow these steps:
  -Click on 'Delete the Cookies' (click OK)
  -Click on "Settings" and change the "amount of disk space to use: ' something between 64 MB and 128 MB. (There may be many more now.)
  -Click OK.
  -Click on 'Delete files', then select "Delete all offline content" (the box), and then click OK. (If you had a LOT, it can take 2 to 10 minutes or more).
  -Once it's done, click OK, close Internet Explorer, open Internet Explorer.

  You can use an application that scans your system for the log files and temporary files and use it to get rid of those who:

  CCleaner (free!)
  http://www.CCleaner.com/
  (just disk cleanup - do not play with the part of the registry for the moment)

  Other ways to free up space...

  SequoiaView
  http://www.win.Tue.nl/SequoiaView/

  JDiskReport
  http://www.jgoodies.com/freeware/JDiskReport/index.html

  Those who can help you discover visually where all space is used. Then, you can determine what to do.

  After that - you want to check any physical errors and fix everything for efficient access"

  CHKDSK
  How to scan your disks for errors* will take time and a reboot.

  Defragment
  How to defragment your hard drives* will take time

  Cleaning the components of update on your Windows XP computer

  While probably not 100% necessary-, it is probably a good idea at this time to ensure that you continue to get the updates you need. This will help you ensure that your system update is ready to do it for you.

  Download and run the MSRT tool manually:
  http://www.Microsoft.com/security/malwareremove/default.mspx
  (Ignore the details and download the tool to download and save to your desktop, run it.)

  Reset.

  Download/install the latest program Windows installation (for your operating system):
  (Windows XP 32-bit: WindowsXP-KB942288-v3 - x 86 .exe )
  (Download and save it to your desktop, run it.)

  Reset.

  and...

  Download the latest version of Windows Update (x 86) agent here:
  http://go.Microsoft.com/fwlink/?LinkId=91237
  ... and save it to the root of your C:\ drive. After you register on theroot of the C:\ drive, follow these steps:

  Close all Internet Explorer Windows and other applications.

  AutoScan--> RUN and type:
  %SystemDrive%\windowsupdateagent30-x86.exe /WUFORCE
  --> Click OK.

  (If asked, select 'Run'). --> Click on NEXT--> select 'I agree' and click NEXT--> where he completed the installation, click "Finish"...

  Reset.

  Now reset your Windows with this FixIt components update (you * NOT * use the aggressive version):
  How to reset the Windows Update components?

  Reset.

  Now that your system is generally free of malicious software (assuming you have an AntiVirus application), you've cleaned the "additional applications" that could be running and picking up your precious memory and the processor, you have authorized out of valuable and makes disk space as there are no problems with the drive itself and your Windows Update components are updates and should work fine - it is only only one other thing youpouvez wish to make:

  Get and install the hardware device last drivers for your system hardware/system manufacturers support and/or download web site.

• Can someone please tell me what version of Photoshop Elements will easily download and run with mac Snow Leopard 10.5.8?

  I posted a question which was: can someone please tell me what version of Photoshop Elements works with Mac Snow Leopard 10.6.8.  Then this window pops up saying mark this discussion with a question and this window.  I have no idea how it works. It is already a question and if I need to point out that how this window it looks like a word of edition window, help me to do this? Download, installation, setting up

  You asked the question in the title area instead of the area where the body of your posting is intended to be.  No fault of your own - they need to make more clear form.

  Check the system requirements for the different versions of Photoshop Elements and see who fits your system.  Adobe sells only the latest versions of their software, so if you need an earlier version, you will need to find a seller for her.

  System requirements | Adobe Photoshop Elements

• Can someone please tell me exactly what spec, I need to buy a unit of optical disc (DVD) to replace my MacBook Pro 15 "mid-2009?

  Can someone please tell me exactly what spec, I need to buy a unit of optical disc (DVD) to replace my MacBook Pro 15 "mid-2009? When I try to insert a disc, there is a solid block in the slot.

  I guess that you may have about a Superdrive replacement for your MacBook Pro 2009.

  This link will show you are the specific item and its requirements:

  -040 https://www.iFixit.com/Store/Mac/MacBook-MacBook-Pro-15-inch-8x-SuperDrive/IF185-1? gclid = Cj0KEQjw3ZS-BRD1xu3qw8uS2s4...