guiexample1.java

Java课程中所有的可运行程序 全部都是java课程中所涉及到的源码

import java.awt.event.*;
import java.awt.*;
 public class guiexample1 extends Frame {

private Button b1=new Button("登录");
private Button b2=new Button("重置");
private Button db1=new Button("确定");

private Dialog d=new Dialog(this,"登录结果",false);
private  Label l3=new Label();
TextField txt1,txt2;
public guiexample1(String ss)
{
    super(ss);
    d.setLayout(new FlowLayout());
    d.add(l3);
d.add(db1);
db1.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
               d.dispose();}
                  }  );



d.setSize(200,100);
setLayout(new FlowLayout());

    Label l1=new Label("用户名:");
	add(l1);

	 txt1=new TextField(5);
	add(txt1);

	Label l2=new Label("密码 :");
	add(l2);


	txt2=new TextField(8);
	txt2.setEchoChar('*');
	add(txt2);

b1.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                b1_actionPerformed(e);}
                  }  );
	add(b1);
b2.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                txt1.setText("");
                txt2.setText("");}
                  }  );
	add(b2);}



protected void  b1_actionPerformed(ActionEvent e){
	    String s1=txt1.getText();
	    String s2=txt2.getText();
	    if(s1.equals("admin") && s2.equals("123456"))
	    l3.setText("Welcome!");
	    else
	 l3.setText("Wrong");
	    d.show();
	    }


 public static void main(String args[]) {
        guiexample1 nowFrame=new guiexample1("用户登录 ");
         nowFrame.addWindowListener(new WindowAdapter(){
   public void windowClosing(WindowEvent e){
    System.exit(0);
         }
  });
nowFrame.pack();
  nowFrame.show();
    }

 }