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  1. JDK
  2. JDK-4178939

NullPointerException thrown in java.awt.Window.postProcessKeyEvent

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 1.2.0
    • Fix Version/s: 1.2.0
    • Component/s: client-libs
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      1.2rc2
    • CPU:
      generic
    • OS:
      solaris_2.5.1
    • Verification:
      Not verified

      Description

      The Exception:

      java.lang.NullPointerException
              at java.awt.Window.postProcessKeyEvent(Compiled Code)
              at java.awt.Container.postProcessKeyEvent(Compiled Code)
              at java.awt.Component.dispatchEventImpl(Compiled Code)
              at java.awt.Component.dispatchEvent(Compiled Code)
              at java.awt.EventQueue.dispatchEvent(Compiled Code)
              at java.awt.EventDispatchThread.run(Compiled Code)

      Classes to Reproduce:
      (I'm sorry these aren't very minimal. The first class calls the second.)

      import java.util.zip.*;
      import java.util.Enumeration;

      import views.Legal;

      public class testApplication {
          private Frame frame;

          public static void main(String args[]) throws Exception {
              testApplication testApp = new testApplication();
      testApp.view();
      System.out.println("hello world");
          }

          private void view() throws Exception {
      Label label = new Label("Hello World");

      frame = new Frame("Trivial Application");
      frame.add(label);
      frame.setSize(new Dimension(400,300));
      frame.show();

      testMethod();
          }
          private void testMethod() throws Exception {
      Legal.splashScreen(frame);
          }

      }



      import java.awt.*;
      import java.awt.event.*;

      public class Legal {

          static private Dialog splashScreenDialog = null;
          static private Dialog licenseDialog = null;

          static public void splashScreen(Frame view) {
              // Dialog Dimensions
              //-----------------------------
              int dialogHeight = 480;
              int dialogWidth = 370;
              int copytextHeight = 65;
              int copytextWidth = 240;

              // Throw everything on a panel - the extra panel is here for setting
              // the background to white - Windows doesn't let us do this for a dialog.
              Panel dp = new Panel();
              dp.setName("SplashScreenPane");
              GridBagLayout bl = new GridBagLayout();
              dp.setLayout(bl);
              dp.setBackground(Color.white);



              // Component stuff
              // ------------------------
              String title = "test title";

              splashScreenDialog = new Dialog(view, true);
              splashScreenDialog.setName("SplashScreenDialog");

              splashScreenDialog.setLayout(new BorderLayout());
              splashScreenDialog.setBackground(Color.white);
              splashScreenDialog.setTitle(title);

              Button agButton = new Button("kill me");
              agButton.setName("SplashScreenContinueButton");

              // Wire the quit button
              //-------------------------------------------------
              agButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        splashScreenDialog.dispose();
                  }
              });


              // Wire the Keyboard (any key disposes the dialog);
              //-------------------------------------------------
              agButton.addKeyListener(new KeyAdapter() {
      public void keyPressed(KeyEvent event) {
        splashScreenDialog.dispose();
                  }
              });

              // Wire the Keyboard (any key disposes the dialog);
              //-------------------------------------------------
      splashScreenDialog.addKeyListener(new KeyAdapter() {
      public void keyPressed(KeyEvent event) {
        splashScreenDialog.dispose();
                  }
              });

              try {
                  addComponent(dp, agButton, 3, 4, 1, 1, 0, 0, new Insets(5, 1, 5, 5),
      GridBagConstraints.NONE, GridBagConstraints.SOUTHEAST);

              }
              catch (Exception e) {
                    e.printStackTrace();
              }

      splashScreenDialog.add("Center", dp);

      splashScreenDialog.pack();
      splashScreenDialog.setSize(dialogWidth, dialogHeight);

      Point loc = view.getLocation();
      Dimension fDim = view.getSize();
      Dimension dDim = splashScreenDialog.getSize();

      // center the dialog frame
      loc.translate((fDim.width - dDim.width)/2, (fDim.height - dDim.height) / 2);
      splashScreenDialog.setLocation(loc.x, loc.y);

      splashScreenDialog.show();

      splashScreenDialog.repaint();

          }

          public static void addComponent (Container container, Component component, int gridx, int gridy, int gridwidth, int gridheight, double weightx, double weighty, Insets insets, int fill, int anchor) throws AWTException {
              LayoutManager lm = container.getLayout();

              if (! (lm instanceof GridBagLayout)) {
                      throw new AWTException ("Invalid layout" + lm);
              }
              else {
                      GridBagConstraints gbc = new GridBagConstraints();
                      gbc.gridx = gridx;
                      gbc.gridy = gridy;
                      gbc.gridwidth = gridwidth;
                      gbc.gridheight = gridheight;
                      gbc.weightx = weightx;
                      gbc.weighty = weighty;
                      gbc.insets = insets;
                      gbc.fill = fill;
                      gbc.anchor = anchor;
                      container.add(component, gbc);
              }

          }

      }

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              • Assignee:
                mbronsonsunw Mike Bronson (Inactive)
                Reporter:
                duke J. Duke (Inactive)
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                Dates

                • Created:
                  Updated:
                  Resolved:
                  Imported:
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