用网格布局写了个简单的例子！~想美观可使用GridBagLayout布局方式。
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class Login extends JFrame implements ActionListener {
private static final long serialVersionUID = -2890322100614715274L;
//文本框
private JTextField jtf = null;
private JPasswordField jpf = null;
private JLabel jl = null;
public Login() {
// TODO Auto-generated constructor stub
//获取容器
Container c = this.getContentPane();
//设置布局方式， 网格布局 3行2列
c.setLayout(new GridLayout(3, 2));
jtf = new JTextField();
jpf = new JPasswordField();
JButton b = new JButton("显示");
// 添加按钮监听
b.addActionListener(this);
jl = new JLabel();
c.add(new JLabel("用户名："));
c.add(jtf);
c.add(new JLabel("密 码："));
c.add(jpf);
c.add(b);
c.add(jl);
this.pack();
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
/**
* 事件监听方法.
*
Title: actionPerformed
*
Description:
* @param e
* @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
*/
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
//获取监听 组件的文本
String str = e.getActionCommand();
if("显示".equals(str)) {
jl.setText("用户名是：" + jtf.getText() + "\n密码是：" + new String(jpf.getPassword()));
}
}
public static void main(String[] args) {
new Login();
}
}