Question

JAVA关闭窗口问题

import java.awt.*;
import java.awt.event.*;
public class Testscoll extends WindowAdapter
{
public Testscoll()
{
Frame f = new Frame("javascollpane");
ScrollPane scr = new ScrollPane();
TextArea text = new TextArea("",50,50,TextArea.SCROLLBARS_NONE);
scr.add(text);
f.add(scr);
f.setSize(60,60);
f.setVisible(true);
f.addWindowListener(new WindowAdapter()
{
public void windowClosed(WindowEvent e)
{
((Window)e.getComponent()).dispose();
System.out.print("quit");
System.exit(0);
}
});

}
public static void main(String []args)
{
new Testscoll();
}
}
运行后正常,但是窗口不能关闭,输出语句也没执行,哪里错了??
我是想问AWT中的事件处理,不用SWING的情况

Answer 1

窗口关闭事件是windowClosing,不是windowClosed。
windowClosed是父组件关闭它的时候调用。

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

public class Testscoll {

    public Testscoll() {
        Frame f = new Frame("javascollpane");
        ScrollPane scr = new ScrollPane();
        TextArea text = new TextArea("", 50, 50, TextArea.SCROLLBARS_NONE);
        scr.add(text);
        f.add(scr);
        f.setSize(60, 60);
        f.setVisible(true);
        f.addWindowListener(new WindowAdapter() {

            public void windowClosing(WindowEvent e) {// <--不是windowClosed，是windowClosing
                ((Window) e.getComponent()).dispose();
                System.out.print("Closing");
                System.exit(0);
            }
        });

    }

    public static void main(String[] args) {
        new Testscoll();
    }
} 

Answer 2

1. 添加import javax.swing.*;
2. Frame变成JFrame
3. 添加 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
如下：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Testscoll extends WindowAdapter
{
public Testscoll()
{
JFrame f = new JFrame("javascollpane");
ScrollPane scr = new ScrollPane();
TextArea text = new TextArea("",50,50,TextArea.SCROLLBARS_NONE);
scr.add(text);
f.add(scr);
f.setSize(60,60);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
f.addWindowListener(new WindowAdapter()
{
public void windowClosed(WindowEvent e)
{
((Window)e.getComponent()).dispose();
System.out.print("quit");
System.exit(0);
}
});

}
public static void main(String []args)
{
new Testscoll();
}
}

Answer 3

输入"exit",回车就可以了

Answer 4

我觉得是你的监听事件有问题····具体说不出··感觉怪怪的·