UnsupportedOperationException - why?

Similar Questions

• Why Java isn't letting me change the background color of the current Panel?

  Basically, I just try to learn all that there is on interactive mouse movements and seeks to build a kind of frankenstein-ish drawing program.
  
  Here is the code:
  

  import java.awt.Color;
  import java.awt.event.MouseEvent;
  import java.awt.event.MouseListener;
  import java.awt.event.MouseMotionListener;
  import javax.swing.JButton;
  import javax.swing.JFrame;
  import javax.swing.JOptionPane;
  import javax.swing.JPanel;
  
  
  public class MyPaint extends JPanel
  {
      JButton button;
      JFrame frame;
      int currentX;
      int currentY;
      int counter = 1;
      
      public MyPaint()
      {
          createComponents();
          addComponentsToPanels();
          setFrameProperties();
          activateListeners();
      }
  
      public void addComponentsToPanels()
      {
          this.add(button);
      }
  
      public void createComponents()
      {
          button = new JButton("Button");
          button.setToolTipText("This is the first button");
      }
  
      public void setFrameProperties()
      {
          frame = new JFrame();
          frame.setSize(400,400);
          frame.setResizable(false);
          frame.setVisible(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.add(this);
      }
  
      public void activateListeners()
      {
          MyMouseListener listener = new MyMouseListener();
          button.addMouseListener(listener);
          button.addMouseMotionListener(listener);
      }
  
      private class MyMouseListener implements MouseListener, MouseMotionListener
      {
          MyPaint myPaint = new MyPaint();
  
          public void mouseClicked(MouseEvent e) throws UnsupportedOperationException
          {
              JOptionPane.showMessageDialog(null,"The mouse was clicked!");
          }
  
          public void mousePressed(MouseEvent e) throws UnsupportedOperationException
          {
              JOptionPane.showMessageDialog(null,"The mouse was pressed!");
          }
  
          public void mouseReleased(MouseEvent e) throws UnsupportedOperationException
          {
              JOptionPane.showMessageDialog(null,"The mouse was released!");
          }
  
          public void mouseEntered(MouseEvent e) throws UnsupportedOperationException
          {
              myPaint.setBackground(Color.RED); // why isn't this working? - I want the original panel to be red (not the newly created windows on top)
          }
  
          public void mouseExited(MouseEvent e) throws UnsupportedOperationException
          {
              myPaint.setBackground(Color.BLUE); // why isn't this working? - I want the original panel to be blue (not the newly created windows on top)
          }
  
          public void mouseDragged(MouseEvent e) throws UnsupportedOperationException
          {
              currentX = e.getX();
              currentY = e.getY();
              repaint();
          }
  
          public void mouseMoved(MouseEvent e) throws UnsupportedOperationException // why is this only being called once?
          {
              System.out.println("mouseMoved: " + counter);
              counter++;
          }
      }
  
      public static void main(String[] args)
      {
          new MyPaint();
      }
  }

  I just want to know how to make the inner class to set the background of the Panel of the outer class to the same window, instead of doing what I want, but in a newly opened window.
  
  Any help to resolve this would be greatly appreciated!
  Thanks in advance!

  MyPaint myPaint = new MyPaint();

  Get rid of this line, it is originally an unlimited number of images to create.

  Then replace the following lines:

  //            myPaint.setBackground(Color.RED);
              setBackground(Color.RED); 
  
  ...
  //            myPaint.setBackground(Color.BLUE);
              setBackground(Color.BLUE); 
  

• UnsupportedOperationException in the CDMAInfo.getCellInfo () method

  Hello

  When we run the following device code (BB Bold, 4.6) generates the error "net.rim.device.api.system.UnsupportedOperationException."

  --------------------------------------------------------------------------------

  CDMAInfo.CDMACellInfo _CDMAInfo = CDMAInfo.getCellInfo ();

  int CDMABID = _CDMAInfo.getBID ();

  -------------------------------------------------------------------------------

  We are sure that we have a CDMA/UMTS coverage we are committed to CDMA/UMTS network.

  The same method with GPRSInfo.GetCellInfo () produces no error and works fine (but there are CDMA cellular settings)

  There someone know why the CDMACellInfo does not work?

  Please help ;-)

  Check if this is true:

  RadioInfo.getNetworkType() == RadioInfo.NETWORK_CDMA
  

  If this isn't the case, you are not on a CDMA network and the class CDMAInfo throw exceptions.

• UnsupportedOperationException when adding to a list

  Hello
  
  I got this exception thrown and I don't know what the problem is. I adds an element to a simple list using the add (x) method. I get it, it has to do with the fact that aList is initialized as Arrays.asList (...), when I instantiated aList as new ArrayList < integer > () the exception is thrown. What is the problem?
  

  public class PythonLists {
      public static void main(String[] args) {
          
          List<Integer> aList = Arrays.asList(1, 2, 3, 4, 5);
          //List<Integer> aList = new ArrayList<Integer>(); //if I uncomment this line and swap with the previous line the exception is not thrown
          System.out.println(aList.getClass().getSimpleName());
          
          System.out.println(aList.toString());
          System.out.println(aList.get(0));
          
          aList.add(6); //This line throws UnsupportedOperationException
          System.out.println(aList.addAll(Arrays.asList(7, 8)));   
      }   
  }

  Appreciate all the help,
  
  PR.

  And there is a good reason why Arrays.asList () does what he does (especially it allows you to use berries and class Collections, you have an array or a collection at the start).

  You can always do

  List list = new ArrayList(Arrays.asList(1, 2, 3, 4));
  

• Why is my 'paint' program drawing pixel separated instead of lines? + Info

  Hi, I just want to know why my mousedPressed() and mouseMoved() methods are not allowing me to draw a normal line. I noticed that as soon I move the cursor over the effect of rough pixel is present and the downturn, I have to move, more it looks like a line. Also, why isn't the background color of the Panel to be changed whenever I have add the paintComponent() method and what could I do to fix the problem?
  
  Here is the code:

  import java.awt.BorderLayout;
  import java.awt.Color;
  import java.awt.Graphics;
  import java.awt.event.MouseEvent;
  import java.awt.event.MouseListener;
  import java.awt.event.MouseMotionListener;
  import javax.swing.JButton;
  import javax.swing.JFrame;
  import javax.swing.JOptionPane;
  import javax.swing.JPanel;
  
  
  public class MyPaint extends JPanel
  {
      JButton button;
      JFrame frame;
      int firstX;
      int firstY;
      int currentX;
      int currentY;
      int counter = 1;
  
      public MyPaint()
      {
          createComponents();
          addComponentsToPanels();
          setFrameProperties();
          activateListeners();
      }
  
      public void addComponentsToPanels()
      {
          this.add(button);
      }
  
      public void createComponents()
      {
          button = new JButton("Button");
          button.setToolTipText("This is the first button");
      }
  
      public void setFrameProperties()
      {
          frame = new JFrame();
          frame.setSize(400,400);
          frame.setResizable(false);
          frame.setVisible(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.add(this);
      }
  
      protected void paintComponent(Graphics g)
      {
          g.drawLine(firstX, firstY, currentX, currentY); // why is this choppy set of pixels instead of a smooth line?
      }
  
      public void activateListeners()
      {
          MyMouseListener listener = new MyMouseListener();
  
          // Make a button action listener later
  
          this.addMouseListener(listener);
          this.addMouseMotionListener(listener);
      }
  
      private class MyMouseListener implements MouseListener, MouseMotionListener
      {
  
          public void mouseClicked(MouseEvent e) throws UnsupportedOperationException
          {
  //            JOptionPane.showMessageDialog(null,"The mouse was clicked!");
          }
  
          public void mousePressed(MouseEvent e) throws UnsupportedOperationException
          {
  //            JOptionPane.showMessageDialog(null,"The mouse was pressed!");
              firstX = e.getX();
              firstY = e.getY();
          }
  
          public void mouseReleased(MouseEvent e) throws UnsupportedOperationException
          {
  //            JOptionPane.showMessageDialog(null,"The mouse was released!");
          }
  
          public void mouseEntered(MouseEvent e) throws UnsupportedOperationException
          {
              setBackground(Color.RED); // why isn't this working when I have a paintComponent method? - I want the panel to be red
          }
  
          public void mouseExited(MouseEvent e) throws UnsupportedOperationException
          {
              setBackground(Color.BLUE); // why isn't this working when I have a paintComponent method? - I want the panel to be blue
          }
  
          public void mouseDragged(MouseEvent e) throws UnsupportedOperationException
          {
              currentX = e.getX();
              currentY = e.getY();
              repaint();
              firstX = currentX;
              firstY = currentY;
          }
  
          public void mouseMoved(MouseEvent e) throws UnsupportedOperationException
          {
              System.out.println("mouseMoved: " + counter);
              counter++;
          }
      }
  
      public static void main(String[] args)
      {
          new MyPaint();
      }
  }

  Any help would be greatly appreciated!
  Thanks in advance!

  Move these two lines:

  firstX = currentX;
  1st = currentY;

  just after drawLine in PaintComponent.

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