change_password.java

一个关于图书馆管理系统的课程设计

//学生修改自己的密码
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.sql.*;
public class change_password extends JFrame implements ActionListener
{
	TextField a_name ;
	TextField a_password2;
	TextField a_password3;
	Label a_name0=new Label("用户名  ");
	Label a_password0=new Label("新密码  ");
	Label a_password1=new Label("新密码  ");
	JButton b1=new JButton("返回");
	JButton a_enter;
	String s1;
	String s2;
	public change_password()
	{
    	super("change_password");		
		a_name = new TextField(20); 
		a_password2=new TextField(20);
		a_password3=new TextField(20);
		a_password2.setEchoChar('*');
		a_password3.setEchoChar('*');
		 a_enter= new JButton("确定");
		a_enter.addActionListener(this);
		b1.addActionListener(this);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设定关闭窗体时退出程
		JPanel pane=new JPanel();//定义主面板
		pane.setLayout(new FlowLayout());
		pane.add(a_name0); 
		pane.add(a_name); 
		pane.add(a_password0); 
		pane.add(a_password2); 
		pane.add(a_password1); 
		pane.add(a_password3);		
		pane.add(a_enter);
		pane.add(b1);
		this.add(pane);
	}
	public void actionPerformed(ActionEvent ej)
	{
		if(ej.getSource()==a_enter)
		{
			s1=a_password2.getText();
			s2=a_password3.getText();
			if(s1.trim().equals(s2))
			{
				new myDialog1();
			}
			else{
				new myDialog2();
			}
		}
		else
		{
			system_manage x1=new system_manage();
			x1.setVisible(true);
			x1.setLocation(300,300);
			x1.setSize(150,200);
		}
	}

	public static void main(String args[])
	{
		change_password x=new change_password();
		x.setVisible(true);
		x.setLocation(300,300);
		x.setSize(250,200);
	}
}