jpasswordfieldtest.java

编程之道--java程序设计入门源代码

/**
 *　密码域的测试
 */
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JPasswordField;

public class JPasswordFieldTest
{
	public static void main(String[] args)
	{
		JPasswordFieldFrame frame = new JPasswordFieldFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
	}
} 

class JPasswordFieldFrame extends JFrame
{
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	
	public JPasswordFieldFrame()
	{
		setSize(WIDTH, HEIGHT);//设置框架的大小		
		setTitle("密码域测试");//设置框架的标题
		
		Container con = getContentPane();//得到了内容窗格
		
		JPanel panel = new JPanel();
		JPasswordField password = new JPasswordField(10);
		password.setEchoChar('#');
		panel.add(password);
		con.add(panel);
	}
}