日期:2014-05-20 浏览次数:20754 次
import java.awt.FlowLayout; import javax.swing.JButton; import javax.swing.JFrame; public class Test111{ public static void main(String[] args) { JFrame jf = new JFrame(); for(int i=0;i<100;i++){ JButton jb = new JButton("helloworld!"); jf.add(jb); } jf.setLayout(new FlowLayout(0)); jf.setSize(400, 300); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setVisible(true); } }
package test.org.ross.util;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CardLayoutDemo implements ActionListener{
JPanel p1,p2,p3,p4;
int i=1;
JFrame f;
public CardLayoutDemo(){
f=new JFrame();//当做top-level组件
Container contentPane=f.getContentPane();
contentPane.setLayout(new GridLayout(2,1));
p1=new JPanel();
Button b=new Button("Change Card");
b.addActionListener(this);//当按下"Change Card"时,进行事件监听,将会有系统操作产生。
p1.add(b); //处理操作在52-64行.
contentPane.add(p1);
p2=new JPanel();
p2.setLayout(new FlowLayout());
p2.add(new JButton("first"));
p2.add(new JButton("second"));
p2.add(new JButton("third"));
p3=new JPanel();
p3.setLayout(new GridLayout(100,1));
for (int i = 0; i < 100; i++) {
p3.add(new JButton(""+i));
}
p4=new JPanel();
p4.setLayout(new CardLayout());
p4.add("one",p2);
p4.add("two",new JScrollPane(p3));
/*要显示CardLayout的卡片,除了用show(Container parent,String name)这个方法外
*,也可试试first(Container),next(Container),previous(Container),last(Container)这
*四个方法,一样可以达到显示效果。
*/
((CardLayout)p4.getLayout()).show(p4,"one");
contentPane.add(p4);
f.setTitle("CardLayout");
f.pack();
f.setVisible(true);
f.addWindowListener(
new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent event){
switch(i){
case 1:
((CardLayout)p4.getLayout()).show(p4,"two");
break;
case 2:
((CardLayout)p4.getLayout()).show(p4,"one");
break;
}
i++;
if (i==3) i=1;
f.validate();
}
public static void main(String[] args){
new CardLayoutDemo();
}
}