Question

java编写一个更改密码校验程序，有两个密码框，一个用于输入新密码，另一个请输入确认密码……

java编写一个更改密码校验程序，有两个密码框，一个用于输入新密码，另一个请输入确认密码，如果两个密码框中的内容一致，则“确认”按钮后弹出消息框“修改成功！”否则弹出警告框“失败，请确认密码！”

Answer 1

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class keyPassword extends JDialog{
    private JLabel jl1 = new JLabel("password:");
    private JLabel jl2 = new JLabel("确认密码");
    private JTextField pwd1 = new JTextField(18);
    private JTextField pwd2 = new JTextField(18);
    private JButton sure = new JButton("确定");
    private JPanel jp1 = new JPanel();

    public keyPassword(){
        setVisible(true);
        setSize(300, 150);
        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        jp1.add(jl1);
        jp1.add(pwd1);
        jp1.add(jl2);
        jp1.add(pwd2);
        jp1.add(sure);
        
        sure.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent arg0) {
                String str = pwd1.getText();
                String str2 = pwd2.getText();
                
                if(str.equals("") || str2.equals("")){
                    JOptionPane.showMessageDialog(null, "不能为空");
                }else if(str.equals(str2)){
                    JOptionPane.showMessageDialog(null, "两次密码相同！");
                }else{
                    JOptionPane.showMessageDialog(null, "两次密码不相同！");
                }
                
            }
        });
        add(jp1);
    }
        
    public static void main(String[] args) {
        
        new keyPassword();
    }

}

 

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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class keyPassword extends JDialog{
    private JLabel jl1 = new JLabel("password:");
    private JLabel jl2 = new JLabel("确认密码");
    
    private JPasswordField jpf = new JPasswordField(18);
    private JPasswordField jpf2 = new JPasswordField(18);
    
    private JButton sure = new JButton("确定");
    private JPanel jp1 = new JPanel();

    public keyPassword(){
        setVisible(true);
        setSize(300, 150);
        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        jp1.add(jl1);
        jp1.add(jpf);
        jp1.add(jl2);
        jp1.add(jpf2);
        jp1.add(sure);
        
        sure.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent arg0) {
                
                char[] str_ = jpf.getPassword();
                String str=String.copyValueOf(str_);
                char[] str2_ = jpf2.getPassword();
                String str2 =String.copyValueOf(str2_);
                
                if(str.equals("") || str2.equals("")){
                    JOptionPane.showMessageDialog(null, "不能为空");
                }else if(str.equals(str2)){
                    JOptionPane.showMessageDialog(null, "两次密码相同！");
                }else{
                    JOptionPane.showMessageDialog(null, "两次密码不相同！");
                }
                
            }
        });
        add(jp1);
    }
        
    public static void main(String[] args) {
        
        new keyPassword();
    }

}

Answer 2

import java.util.Scanner;

public class Test
{
    
    /**
     * @param args
     */
    public static void main(String[] args)
    {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("请输入新密码：");
        String newPassword1 = input.next();
        System.out.println("请再次输入密码：");
        String newPassword2= input.next();
        
        if(newPassword1.equals(newPassword2))
        {
            System.out.println("密码修改成功！");
        }
        else
        {
            System.out.println("两次密码不一致");
        }
    }
    
}

Answer 3

<html>
<head>
<title>
修改密码
</title>
</head>
<script>
function eq_yes_or_no(){
var pass1=document.getElementById("psd1").value;
var pass2=document.getElementById("psd2").value;
if(pass1==pass2){
alert("修改成功！");
}else{
alert("密码不一样！");
}
}
</script>
<body>
<input type="text" id="psd1" value=""/>
<input type="text" id="psd2" value=""/>
<input type="button" value="确认" onclick="eq_yes_or_no()"/>
</body>
</html>

Answer 4

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class changeTitle extends JFrame implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
public static final int width = 250;
public static final int height = 150;
JTextField text1;
JTextField text2;
JLabel la1;
JPanel la11;
JLabel la2;
JPanel la22;
JButton jbn;
changeTitle(){
setTitle("hello");
setSize(width, height);
setLayout(new FlowLayout());
text1=new JPasswordField(15);
text2=new JPasswordField(15);
la11=new JPanel();
la22=new JPanel();
la1=new JLabel("输新密码:");
la2=new JLabel("确认密码:");
jbn=new JButton("修改密码");
la11.add(la1);
la11.add(text1);
la22.add(la2);
la22.add(text2);
add(la11);
add(la22);

add(jbn);
jbn.addActionListener(this);
}

public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource()==jbn){
if(text1.getText().equals(text2.getText())){
JOptionPane.showMessageDialog(null, "修改成功", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "两次输入不相同", "提示", JOptionPane.ERROR_MESSAGE);
}
}

}

public static void main(String[] args ){
changeTitle changetitle=new changeTitle();
changetitle.setVisible(true);
changetitle.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

}