Could someone please check my code is correct and clean

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  Kind regards

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  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 help with two differences between CS and CS4?

  Hello, I have just moved from Photoshop CS to CS4 and have a few questions about the differences I see in both versions.

  (1) for the opening of files, I'm used to open them in a smaller view like the individual windows.  CS4 open all the images in the expanded view.  Is there a way to avoid this?  I create massive sports photo (often more than 100 images) galleries generally open 25 to 30 images at the same time and minimize all images and work on it at the same time in chronological order.  It was CS4 open these images in full screen, it prevents me from doing this within a reasonable time - PS never opens a group of photos in a true chrono order.  He lost the first frame at the end.

  (2) to the CS, I used to power the mouse right click on the title bar of the image to change the image and canvas size.  Is it possible to get it works in CS4?  CTL + ALT and I or C is a process of three keys and takes considerably longer than right click of my mouse and choosing the correct option.

  Thanks for any help you can provide.  And apology for have such a beginner to the latest and greatest version of Photoshop.  I lived in CS years

  Mike

  Photoshop CS4 preferences > Interface gives the option to "Open Documents as tabs". If checked, this option opens in view 'tab' in which the image occupies the entire screen. Uncheck the option opens in "floating" mode, which allows multiple images to be displayed to the screen. What is the mode opens, you can switch to the other via the window > reorder the options 'Float in the window' or its opposite "consolidate all windows." Another way to switch tabs floating mode is to drag the title bar of image in the display area. Similarly, you can move from floating tabbed by dragging the title bar in the area of the tabs.