第十二周课程总结

package 登录界面;
import java.awt.Font; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPasswordField; 
import javax.swing.JTextField; 


public class LoginWindows implements ActionListener {
    JFrame frame;//新建一个窗体对象
    JLabel lblUser,lblPsw;
    JTextField tfUser;
    JPasswordField pfUser;
    JButton btnLogin,btnReset;
    JTextField UserText;    
    JLabel lblResult;
    JPasswordField PswText;
    
    public LoginWindows(){
        frame=new JFrame("登录窗口");//新建一个窗体对象
        lblUser=new JLabel("用户名");
        lblPsw=new JLabel("密码");
        tfUser=new JTextField();
        pfUser=new JPasswordField();
        btnLogin=new JButton("登录");
        btnReset=new JButton("重置");
        lblResult = new JLabel("用户登录系统");//声明一个标签 
        UserText=new JTextField();
        PswText=new JPasswordField();
            
        
        
        Font fnt=new Font("Serief",Font.BOLD,12);
        frame.setFont(fnt);
        btnReset.addActionListener(this); //加入按钮监听 
        btnReset.addActionListener(this); 
        frame.setLayout(null);
        lblUser.setBounds(10,10,40,30);
        lblPsw.setBounds(10,50,40,30);
        tfUser.setBounds(60,10,100,30);
        pfUser.setBounds(60,50,100,30);
        btnLogin.setBounds(40,90,60,30);
        btnReset.setBounds(120,90,60,30);
        lblResult.setBounds(50,140,200,30);   
        
        frame.add(lblUser);
        frame.add(lblPsw);
        frame.add(tfUser);
        frame.add(pfUser);
        frame.add(btnLogin);
        frame.add(btnReset);
        frame.add(lblResult);
        frame.add(btnLogin); 
        frame.add(btnReset); 
        frame.add(UserText); 
        frame.add(PswText); 
        
       
        

        frame.setSize(300,150); //设置窗体大小 
        frame.setVisible(true); //显示窗体 
}
        public void actionPerformed(ActionEvent arg0) { 
            if(arg0.getSource()==btnLogin){ //判断触发源是否是提交按钮 
                String tname = UserText.getText();     //得到输入的用户名 
                //得到输入的密码，此时通过getPassword()方法返回的是字符数组 
                String tpass = new String(PswText.getPassword()); 
                if(tname.equals("helei")&&tpass.equals("123456")){ 
                    lblResult.setText("登录成功，欢迎光临！"); 
                }else{ 
                    lblResult.setText("登录失败，用户名或密码错误！"); 
                } 
            } 
            if(arg0.getSource()==btnReset){ //判断触发源是否是提交按钮 
                UserText.setText(""); //清空文本框内容 
                PswText.setText(""); //清空密码框内容 
                lblResult.setText("用户登录系统！"); //恢复标签显示 
            } 
        }         
} 

package 登录界面;

public class text {
     public static void main(String[] args){
         new LoginWindows(); 
     }
}