maglogindemo.java

java开发的桌面系统

/**
 * @(#)MagLoginDemo.java
 *
 *
 * @author 
 * @version 1.00 2006/7/9
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;//JPasswordField 是一个轻量级组件，允许编辑单行文本，其视图指示键入内容，但不显示原始字符



public class MagLoginDemo extends Frame {
	Panel p,pInput,pBut;
	Label lbName,lbPwd;
	TextField tfName;
	JPasswordField tfPwd;
	Button sure,cancle;
	ManagementTest mTest = null;
        
    /**
     * Creates a new instance of <code>MagLoginDemo</code>.
     */
    public MagLoginDemo() {
    	
    	super("登入界面");
    	this.init();
    }
    
    public void init(){
    
    	p = new Panel();
    	pInput = new Panel();
    	pBut = new Panel();
    	
    	lbName = new Label("输入用户名");
    	lbPwd = new Label("输入密码");
    	
    	tfName = new TextField(40);
    	tfPwd = new JPasswordField(40);
	tfPwd.setEchoChar('*');
    	
    	sure = new Button("确定");
    	cancle = new Button("重设");
    	
    	p.setLayout(new BorderLayout(5,5));
    	pInput.setLayout(new GridLayout(4,1));
    	pBut.setLayout(new GridLayout(1,2,5,5));
    	
    	pInput.add(lbName);
    	pInput.add(tfName);
    	pInput.add(lbPwd);
    	pInput.add(tfPwd);
    	
    	pBut.add(sure);
    	pBut.add(cancle);
    	
    	sure.addActionListener(new OnClickDemo());
    	cancle.addActionListener(new OnClickDemo());
    	
    	p.add(pInput,BorderLayout.CENTER);
    	p.add(pBut,BorderLayout.SOUTH);
    	
    	this.addWindowListener(new WindowAdapter(){
    		public void windowClosing(WindowEvent e){
    			dispose();
    		}
    	});
    	
    	p.setBackground(Color.cyan);
    	
    	this.add(p);
    	this.pack();
    	this.setSize(250,200);
    	this.setLocation(500,250);
    	this.setResizable(false);
    	this.setVisible(true);
    }
    private class OnClickDemo implements ActionListener{
    		public void actionPerformed(ActionEvent e){
    			
    			if(e.getActionCommand().equals("确定")){
    				if(tfName.getText().equals("admin")  && tfPwd.getText().equals("123456")){
    				
    					if(mTest == null){
    						mTest = new ManagementTest();
    						dispose();
    					}
    					else
    						mTest.setVisible(true);
    				}
    				else 
    					JOptionPane.showMessageDialog(null, "请输入正确用户名和密码");
    			}
    			else if(e.getActionCommand().equals("重设")){
    				tfName.setText("");
    				tfPwd.setText("");
    				
    			}
    			
    		}
    	}
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        new MagLoginDemo();
    }
}