菜鸟问题,求高手解答!!!
为什么得到的按钮总是充满整个框架,怎样才能调整到合适的位置?代码如下:
package Swing;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class YesNoDemo extends JFrame
{
JButton button=null;
public YesNoDemo()
{
try{
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
}catch(Exception e){}
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
button=new JButton("Click me");
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int resurt=JOptionPane.showConfirmDialog(null,"Exit this program now?","please answer",JOptionPane.YES_NO_OPTION);
if(resurt==JOptionPane.YES_OPTION)
System.exit(0);
}
});
Container contentPane=getContentPane();
contentPane.add(button);
}
public static void main(String[] args) {
YesNoDemo app=new YesNoDemo();
app.setSize(320,240);
app.show();
}
}