java swing 一个窗口打开新创口 加上go()程序就死掉了

Question

import javax.swing.*;

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

public class Swing7 extends JFrame implements ActionListener {
JButton jb = new JButton();

public Swing7() {
    this.setTitle("Java——");
    jb.setText("确定");
    jb.setMnemonic('a');
    this.add(jb);
    this.setBounds(200, 300, 250, 300);
    this.setVisible(true);
    jb.addActionListener(this); //由于Swing7实现了ActionListener接口，所以给jb添加的ActionListener就是Swing7实例。
}

public void actionPerformed(ActionEvent e) {// 实现ActionListener接口的actionPerformed接口。

    yidengjiang frame=new yidengjiang();
    frame.setVisible(true);
}

public static void main(String args[]) {
    Swing7 s = new Swing7();
}

}

import java.awt.*;
import java.awt.event.*;
import java.util.Random;

import javax.swing.*;

public class yidengjiang extends JFrame implements ActionListener {

/**
 * 
 */
private static final long serialVersionUID = -8560277451929244119L;
JTextField tf = new JTextField();
JButton b1 = new JButton("开始");
JButton b2 = new JButton("停止");
boolean isGo = false;
String path = "223.jpg";
ImageIcon background = new ImageIcon(path);
JTextArea jiang1= new JTextArea();
int choujiangcishu=1;

public yidengjiang() {
    this.getContentPane().setLayout(null);
    Dimension srcDim = Toolkit.getDefaultToolkit().getScreenSize();  
    System.out.println(srcDim.width+"   "+srcDim.height);
    this.setExtendedState(JFrame.MAXIMIZED_BOTH);
    this.getContentPane().add(tf);

    this.getContentPane().add(b1);

    ImageIcon background = new ImageIcon(path);// 背景图片
    JLabel jlbg = new JLabel(background);// 把背景图片显示在一个标签里面
    jlbg.setBounds(0, 0, srcDim.width, srcDim.height);// 把标签的大小位置设置为图片刚好填充整个面板
    JPanel imagePanel = (JPanel) this.getContentPane();
    imagePanel.setOpaque(false);
    this.getLayeredPane().add(jlbg, new Integer(Integer.MIN_VALUE));

    tf.setFont(new Font("Courier", Font.PLAIN, 110));
    tf.setHorizontalAlignment(JLabel.CENTER);
    tf.setOpaque(false);
    //tf.setBackground(Color.red);// 按钮红色背景
    tf.setEditable(false);//不可编辑
    tf.setBorder(BorderFactory.createEmptyBorder());//无边框
    tf.setBounds(srcDim.width/2-srcDim.width/3/2, srcDim.height/2+srcDim.height/10/2, srcDim.width/3, srcDim.height/10);

    b1.setBounds(0,0,0,0);
    b2.setBounds(0,0,0,0);

    jiang1.setBounds(srcDim.width/30, srcDim.height/20,800,800);
    jiang1.setOpaque(false);

    jiang1.setFont(new Font("Courier",Font.PLAIN,22));
    jiang1.setEditable(false);


    this.getContentPane().add(tf);
    this.getContentPane().add(b1);
    this.getContentPane().add(b2);
    this.getContentPane().add(jiang1);


    b1.setActionCommand("start");
    b1.addActionListener(this);
    b2.addActionListener(this);

    SymListener sy = new SymListener();
    b1.registerKeyboardAction(sy,KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0), JComponent.WHEN_IN_FOCUSED_WINDOW); 
    b2.registerKeyboardAction(sy,KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0), JComponent.WHEN_IN_FOCUSED_WINDOW); 

    //jButton.setMnemonic(KeyEvent.VK_ENTER);
    b2.setEnabled(false);

    super.setUndecorated(true);// 无标题栏
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    this.setLocation(0, 0);
    Cursor cu = new Cursor(Cursor.HAND_CURSOR);
    this.setCursor(cu);
    this.setVisible(true);
    tf.setText("888888");
    go();

}    

public void go() {
    while (true) {
        if (isGo == true) {
            String s = "";
            Random rand = new Random();
            for (int j = 1; j <= 1; j++) {
                int i = (int) (Math.random()*260000+1);//设定奖项总数
                if (i < 10) {
                    s = s + "00000" + i;
                } else if(i<100 & i>=10) 
                {
                    s = s + "0000" + i;
                }else if(i<1000 & i>=100) 
                {
                    s = s + "000" + i;
                }else if(i<10000 & i>=1000) 
                {
                    s = s + "00" + i;
                }else if(i<100000 & i>=10000) 
                {
                    s = s + "0" + i;
                }else
                {
                    s = s +  i;
                }

            }
            tf.setText(s);

        }

        try {
            Thread.sleep(10);
        } catch (java.lang.InterruptedException e) {
            e.printStackTrace();
        }

    }


}

public void actionPerformed(ActionEvent e) {

    String s = e.getActionCommand();

    if (s.equals("start")) {
        isGo = true;
        b1.setEnabled(false);
        b2.setEnabled(true);
    } else {
        isGo = false;
        jiang1.setText(jiang1.getText()+"\n"+tf.getText());

        b2.setEnabled(false);
        b1.setEnabled(true);
    }

}

/*public static void main(String[] args)  {
    Dimension srcDim = Toolkit.getDefaultToolkit().getScreenSize(); 
    ImgUtil image =new ImgUtil();
    image.createThumb("3.png", "223.jpg",(int)srcDim.getWidth(), (int)srcDim.getHeight());
    new yidengjiang();

} */   
class SymListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
    Object obj = e.getSource();
    if (obj == b1) {

            isGo = true;
            b1.setEnabled(false);
            b2.setEnabled(true);
    } else if (obj == b2) {

        isGo = false;

        operdata aaa =new operdata();
        String bb= aaa.getuserdata(tf.getText());

        jiang1.setText(jiang1.getText()+"\n"+""+(choujiangcishu++)+":  "+tf.getText()+bb);

        b2.setEnabled(false);
        b1.setEnabled(true);

    }
    }
    }

}

Answer 1

SWING是单线程的，需要将循环放到单独的线程中执行。修改成这个：

new Thread(){
            public void run() {go();};
        }.start();