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);
        }

    }

}