在java中有一个设置窗口关闭的方法,那事件还有什么用处呢?如以下是一个简单的例子.import javax.swing.JFrame;public class SimpleFrame extends JFrame
{
public SimpleFrame()
{
setTitle("Window1");
setSize(400,300);
setDefaultCloseOperation(EXIT_ON_CLOSE); --关闭窗口
setResizable(false);
setVisible(true);
} public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelDecorated(true);
new SimpleFrame();
}
}下面是用了事件的
import javax.swing.JFrame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;public class SimpleFrame extends JFrame
{
public SimpleFrame(String title)
{
super(title);
setSize(400,300);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent event)
{
System.exit(0);
}
});
setResizable(true);
setVisible(true);
}
public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelOperation(true);
new SimpleFrame("Window1");
}
}既然有一个简便的直接关闭窗口的方法,那么为什么还要这么一大段关闭窗口的事件程序,那些WindowListener,WindowEvent,WindowAdapter还有什么用处呢?
{
public SimpleFrame()
{
setTitle("Window1");
setSize(400,300);
setDefaultCloseOperation(EXIT_ON_CLOSE); --关闭窗口
setResizable(false);
setVisible(true);
} public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelDecorated(true);
new SimpleFrame();
}
}下面是用了事件的
import javax.swing.JFrame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;public class SimpleFrame extends JFrame
{
public SimpleFrame(String title)
{
super(title);
setSize(400,300);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent event)
{
System.exit(0);
}
});
setResizable(true);
setVisible(true);
}
public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelOperation(true);
new SimpleFrame("Window1");
}
}既然有一个简便的直接关闭窗口的方法,那么为什么还要这么一大段关闭窗口的事件程序,那些WindowListener,WindowEvent,WindowAdapter还有什么用处呢?
还有很多其他方法诸如windowIconified,windowLostFocus等等
代码如下;
import java.awt.Frame;
import java.awt.Button;
import java.awt.FlowLatout;public class BtnDemo extends Frame
{
private Button btn = new Button("按钮"); public BtnDemo()
{
setTitle("Window");
setSize(400,300);
setDefaultCloseOperation(EXIT_ON_CLOSE); --抱错
setLayout(new FlowLayout());
setVisible(ture);
} public static void main(String[] args)
{
new BtnDemo();
}
}程序抱错,而换成swing界面就可以了.