eclipse调试 true typeFont.open()行:不可用

pp25210 2011-12-08 02:55:27

每次以调试运行的方式运行窗口界面的程序的时候都会出现下面的错误，导致不能进行调试，今天测试的书中源码贴上了，问题的图片也贴上来，期望可以得到指点。



import java.awt.Color;

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;



import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;





public class BuggyButtonTest {

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            public void run() {

                BuggyButtonTestFrame frame = new BuggyButtonTestFrame();



                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                frame.setVisible(true);

            }

        });

    }

}





class BuggyButtonTestFrame extends JFrame {

    public BuggyButtonTestFrame() {

        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

        setTitle("BuggyButtonTest");

        setLocation(200, 300);

		

        // add panel

        BuggyButtonPanel panel = new BuggyButtonPanel();



        add(panel);

    }

	

    private int DEFAULT_WIDTH = 200;

    private int DEFAULT_HEIGHT = 300;

	

}





class BuggyButtonPanel extends JPanel {

    public BuggyButtonPanel() {

        ActionListener listener = new ButtonListener();

		

        JButton yellowButton = new JButton("yellow");



        add(yellowButton);

        yellowButton.addActionListener(listener);

		

        JButton redButton = new JButton("red");



        add(redButton);

        redButton.addActionListener(listener);

		

        JButton blueButton = new JButton("blue");



        add(blueButton);

        blueButton.addActionListener(listener);

    }

	

    private class ButtonListener implements ActionListener {

        public void actionPerformed(ActionEvent event) {

            String arg = event.getActionCommand();



            if (arg.equals("yellow")) {

                setBackground(Color.yellow);

            } else if (arg.equals("red")) {

                setBackground(Color.red);

            } else if (arg.equals("blue")) {

                setBackground(Color.blue);

            }

        }

    }

}