java象棋登录界面的代码

你可参考：;word=java%CF%F3%C6%E5%B5%C7%C2%BC%BD%E7%C3%E6%B5%C4%B4%FA%C2%EB

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还有这个;

package java1;

import java.awt.*;

import java.awt.event.*;

import java.sql.*;

import java.util.*;

import javax.swing.*;

import javax.swing.event.*;

import java.awt.Rectangle;

import java.awt.Font;

public class login extends JFrame

{

public login() {

try {

jbInit();

}

catch (Exception ex) {

ex.printStackTrace();

}

}

public static void main(String[] args)

{

login frm=new login();

frm.setBounds(300,200,300,260);

frm.setVisible(true);

}

private void jbInit() throws Exception {

this.getContentPane().setLayout(null);

jLabel1.setForeground(Color.red);

jLabel1.setText("用户名");

jLabel1.setBounds(new Rectangle(25, 72, 68, 29));

jButton2.setBounds(new Rectangle(142, 159, 81, 30));

jButton2.setText("取消");

jButton2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jButton2_actionPerformed(e);

}

});

jButton1.setBounds(new Rectangle(38, 159, 81, 29));

jButton1.setText("确定");

jButton1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jButton1_actionPerformed(e);

}

});

jTextField1.setBounds(new Rectangle(109, 79, 136, 23));

jPasswordField1.setBounds(new Rectangle(109, 115, 136, 23));

this.getContentPane().add(jLabel1);

jLabel3.setFont(new java.awt.Font("隶书", Font.PLAIN, 24));

jLabel3.setText("学 生 考 试 系 统");

jLabel3.setBounds(new Rectangle(22, 15, 268, 47));

this.getContentPane().add(jTextField1);

this.getContentPane().add(jLabel2);

this.getContentPane().add(jButton2);

this.getContentPane().add(jButton1);

this.getContentPane().add(jLabel3);

this.getContentPane().add(jPasswordField1);

jLabel2.setForeground(Color.red);

jLabel2.setText("密码");

jLabel2.setBounds(new Rectangle(26, 112, 68, 29));

}

JLabel jLabel1 = new JLabel();

JLabel jLabel2 = new JLabel();

JTextField jTextField1 = new JTextField();

JButton jButton1 = new JButton();

JButton jButton2 = new JButton();

JLabel jLabel3 = new JLabel();

JPasswordField jPasswordField1 = new JPasswordField();

main2 wo=new main2();

int sum;

//判断权限的方法

public void success()

{

try{

ResultSet rs1;

String s1="select * from 管理权限 where name='"+jTextField1.getText()+"' and password='"+jPasswordField1.getText()+"'";

rs1=sqlcx.Rs_jiluji(s1);

rs1.first();

sum=Integer.parseInt((String)(rs1.getString(3)));

System.out.println(sum);

very();

}

catch(Exception c)

}

//根据权限设置窗口

public void very()

{

if (sum==1)

{JOptionPane.showOptionDialog(this, "您现在是以教师权限登陆", "登陆信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

}

else

{

JOptionPane.showOptionDialog(this, "你现在是以学生权限登陆", "登陆信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

wo.jButton2.setVisible(false);

wo.jButton3.setVisible(false);

wo.jButton4.setVisible(false);

wo.jButton5.setVisible(false);

wo.jButton6.setVisible(false);

wo.jButton7.setVisible(false);

wo.jButton8.setVisible(false);

wo.jMenu2.setVisible(false);

wo.jMenu3.setVisible(false);

wo.jMenu4.setVisible(false);

}

}

public void jButton1_actionPerformed(ActionEvent e)

{

//判断用户名是否为空

if (jTextField1.getText().length() == 0) {

JOptionPane.showOptionDialog(this, "用户名不能为空", "错误信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

}

//判断密码是否为空

else if (jPasswordField1.getText().length()==0)

{

JOptionPane.showOptionDialog(this,"密码不能为空", "错误信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

}

else

{

try

{

ResultSet rs;//声明记录集

String sql="select * from 管理权限 where name='"+jTextField1.getText()+"'";

rs = sqlcx.Rs_jiluji(sql);

if (rs.next())

{

if(jPasswordField1.getText().equals(rs.getString(2)))

{

success();

wo.setBounds(60,40,700,600);

wo.setVisible(true);

this.dispose();

}

else

{

JOptionPane.showOptionDialog(this,"密码错误", "错误信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

}

}

else

{

JOptionPane.showOptionDialog(this,"没有所要找的用户名", "错误信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

}

}

catch(Exception c){

JOptionPane.showOptionDialog(this,"连接数据库失败", "错误信息"

, JOptionPane.DEFAULT_OPTION,

JOptionPane.ERROR_MESSAGE,

null, null, null);

}

}

}

public void jButton2_actionPerformed(ActionEvent e) {

System.exit(0);

}

}

用java写一个国际象棋的棋盘，输出结果要是一张 国际象棋的棋盘

import java.awt.*;

import javax.swing.*;

public class Chessboard extends JApplet {

int baseXPosition, baseYPosition;

int currentXPosition, currentYPosition;

public void init() {

baseXPosition = 40; // 棋盘的开始x位置

baseYPosition = 40; // 棋盘的开始y位置

setBackground(Color.black); // 设置背景颜色黑色

}

public void paint(Graphics g) { // 绘制棋盘

currentXPosition = baseXPosition; // currentXPosition当前的x位置

currentYPosition = baseYPosition; // currentYPosition当前的y位置

for (int row = 0; row 8; row++) {

currentXPosition = baseXPosition + row * 40;

for (int column = 0; column 8; column++) {

if ((column + row) % 2 == 0)

g.setColor(Color.white); // 设置棋盘格子的颜色

else

g.setColor(Color.red); // 设置棋盘格子的颜色

currentYPosition = baseXPosition + column * 40;

g.drawRect(currentXPosition,currentYPosition,40,40);//;代码4 //在当前位置绘制棋盘的格子；每个格子的大小是40*40像

g.fillRect(currentXPosition,currentYPosition,40,40);

}

}

}

}

显示一个国际象棋棋盘的java源代码

import java.awt.Color;

import javax.swing.*;

public class Chess extends JPanel

{// 继承面板类

public Chess(int grids,int gridsize)

{//grids:行数和列数, gridsize:单元格的高和宽

super(null);

for(int i=0; igrids; i++)

{

for(int j=0; jgrids; j++)

{

JLabel l = new JLabel();//生成标签实例

l.setSize(gridsize,gridsize);

l.setLocation(i*gridsize,j*gridsize);

if((i+j)%2==0)

{ //当小方格的坐标和刚好是偶数时，

l.setBackground(Color.black); //设置为方格为黑色

l.setOpaque(true); //设置为不透明

}

l.setBorder(BorderFactory.createLineBorder(Color.black)); //设置边界为黑色

add(l);//将l标签添加到面板

}

}

}

public static void main(String[] args)

{

JFrame f = new JFrame();

f.setSize(658,677); //边框的长和宽

f.setLocationRelativeTo(null); //设置窗口相对于指定组件的位置

f.add(new Chess(8,80));

f.setVisible(true);

}

}

本文题目：java象棋源代码 java中国象棋源码
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