求一个，java图形化界面的源码

自己写的石头剪子布代码，有图形界面，可以把自己选中的图片命名为.jpg放到工程目录下做背景图片。//////////////////////////// package HomeWork;

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import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.io.*;

import java.util.*;

public class StoneShearsSack { /**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

new StoneWindow("Sample Game");

}

}

final class StoneWindow extends JFrame implements ActionListener,ItemListener{

JLabel win,draw,lose,score,count;

JTextArea text;

JComboBox list;

JButton fight,clear;

int swin,sdraw,slose,sscore;

JPanel panel1 = new JPanel();

JPanel panel2 = new JPanel();

String str1,str2,str3;

Random rdm = new Random();

int flag,random ,flag1, count1;

//final ImageIcon con = new ImageIcon("a.jpg") ;

public StoneWindow(String s){

setTitle("Sample Game");

fight = new JButton("出招");

clear = new JButton("清除分数");

//final ImageIcon con = new ImageIcon("b.jpg") ;

text = new JTextArea(){

final ImageIcon con = new ImageIcon("a.jpg");

Image mg = con.getImage();

{setOpaque(false);}

public void paintComponent(Graphics g){

g.drawImage(mg, 0, 0, this);

super.paintComponent(g);

}

};

text.setForeground(Color.black);

Font f = new Font("华文行楷",Font.BOLD,50);

text.setFont(f);

list = new JComboBox();

list.addItem("石头");

list.addItem("剪子");

list.addItem("布");

panel2.setBackground(Color.blue);

panel2.add(list);

panel2.add(fight);

panel2.add(clear);

panel2.setPreferredSize(new Dimension(900,50));

list.addItemListener(this);

fight.addActionListener(this);

clear.addActionListener(this);

win = new JLabel("赢：" + swin);

draw = new JLabel(" 和：" + sdraw);

lose = new JLabel(" 输：" + slose);

score = new JLabel(" 得分：" + sscore);

count = new JLabel(" 总局：" + count1);

Font f1 = new Font("宋体",1,30);

win.setFont(f1);

draw.setFont(f1);

lose.setFont(f1);

score.setFont(f1);

count.setFont(f1);

win.setForeground(Color.cyan);

draw.setForeground(Color.green);

lose.setForeground(Color.blue);

score.setForeground(Color.black);

count.setForeground(Color.pink);

panel1.setBackground(Color.red);

panel1.add(win);

panel1.add(draw);

panel1.add(lose);

panel1.add(score);

panel1.add(count);

panel1.setPreferredSize(new Dimension(900,50));

add(panel1,BorderLayout.NORTH);

add(text,BorderLayout.CENTER);

add(panel2,BorderLayout.SOUTH);

setBounds(100,100,900,450);

validate();

setVisible(true);

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

}

public void actionPerformed(ActionEvent e){

if(e.getSource() == fight){

if(list.getSelectedItem() == "石头"){

flag = 0;

}

else if(list.getSelectedItem() == "剪子"){

flag = 1;

}

else if(list.getSelectedItem() == "布"){

flag = 2;

}

str1 = (String)list.getSelectedItem();

text.setText("");

text.append("\n");

text.append(" 你 出: " + str1 + "\n");

text.append(" 电脑出: " + this.random() + "\n");

text.append(" 结 果: " + this.result() + "\n");

this.finalresult();

}

if(e.getSource() == clear){

swin = 0;

sdraw = 0;

slose = 0;

sscore = 0;

count1 = 0;

text.setText("");

win.setText(" 赢：" + swin);

draw.setText(" 和：" + sdraw);

lose.setText(" 输：" + slose);

score.setText(" 得分：" + sscore);

count.setText(" 总局：" + count1);

}

}

public String random(){

random = rdm.nextInt(3);

if(random == 0)

str2 = "石头";

else if(random == 1)

str2 = "剪子";

else if(random == 2)

str2 = "布";

return str2;

}

public String result(){

if(random == flag){

str3 ="打平";

flag1 = 0;

}

else if(random flag flag == 1){

str3 = "你输了";

flag1 = 1;

}

else if(random flag random ==1){

str3 = "你输了";

flag1 = 1;

}

else if(random ==2 flag == 0){

str3 = "你输了";

flag1 = 1;

}

else{

str3 = "你赢了";

flag1 = 2;

}

return str3;

}

public void finalresult(){

if(flag1 == 0){

sdraw ++;

draw.setText(" 平：" + sdraw);

score.setText(" 得分：" + sscore);

}

if(flag1 == 1){

slose ++;

sscore = sscore - 10;

lose.setText(" 输：" + slose);

score.setText(" 得分：" + sscore);

}

if(flag1 == 2) {

swin ++;

sscore = sscore + 10;

win.setText(" 赢：" + swin);

score.setText(" 得分：" + sscore);

}

count1 = swin + slose + sdraw;

count.setText(" 总局：" + count1);

}

public void itemStateChanged(ItemEvent e){

}

}

求一java程序，一个界面计算器源代码，跪求大神，有注释最好。。

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

public class GUI extends JFrame implements ActionListener {//实现监听接口

JTextField field = new JTextField(15);

double num1=0,num2;

char op;

public GUI(){

setLayout(new BorderLayout(10,10));

JPanel p1 = new JPanel(new FlowLayout(FlowLayout.CENTER));

p1.add(new JLabel("计算框："));

p1.add(field);

add(p1,BorderLayout.NORTH);

JPanel p2 = new JPanel(new GridLayout(4,1));

//添加按钮

JButton bt1 = new JButton("1");

JButton bt2 = new JButton("2");

JButton bt3 = new JButton("3");

JButton bt4 = new JButton("4");

JButton bt5 = new JButton("5");

JButton bt6 = new JButton("6");

JButton bt7 = new JButton("7");

JButton bt8 = new JButton("8");

JButton bt9 = new JButton("9");

JButton bt0 = new JButton("0");

JButton btDel = new JButton("Del");

JButton btEqual = new JButton("=");

p2.add(bt1);p2.add(bt2);

p2.add(bt3); p2.add(bt4);

p2.add(bt5); p2.add(bt6);

p2.add(bt7);p2.add(bt8);

p2.add(bt9);p2.add(bt0);

p2.add(btDel);p2.add(btEqual);

add(p2,BorderLayout.CENTER);

JPanel p3 = new JPanel(new GridLayout(0,1));

JButton bta = new JButton("+");

JButton btb = new JButton("-");

JButton btc = new JButton("*");

JButton btd = new JButton("/");

p3.add(bta);p3.add(btb);

p3.add(btc);p3.add(btd);

add(p3,BorderLayout.EAST);

//添加监听器

bt1.addActionListener(this);

bt2.addActionListener(this);

bt3.addActionListener(this);

bt4.addActionListener(this);

bt5.addActionListener(this);

bt6.addActionListener(this);

bt7.addActionListener(this);

bt8.addActionListener(this);

bt9.addActionListener(this);

bt0.addActionListener(this);

bta.addActionListener(this);

btb.addActionListener(this);

btc.addActionListener(this);

btd.addActionListener(this);

btDel.addActionListener(this);

btEqual.addActionListener(this);

}

//事件的响应

public void actionPerformed(ActionEvent e){

String str =e.getActionCommand();

String s1 = field.getText();

if(str!="+"str!="-"str!="*"str!="/"str!="="str!="Del"){//为数字按钮时

field.setText(s1+str);

}

else if(str=="Del"){//删除键

field.setText("");

str=null;

}

else if(str=="="){//等号按钮

s1 =field.getText();

String t2 ="";

int flag=0;//标记操作符的位置

if(s1.indexOf("+")!=-1)

flag = s1.indexOf("+");

if(s1.indexOf("-")!=-1)

flag = s1.indexOf("-");

if(s1.indexOf("*")!=-1)

flag = s1.indexOf("*");

if(s1.indexOf("/")!=-1)

flag = s1.indexOf("/");

for(int i=flag+1;is1.length();i++)

{

t2+=s1.charAt(i);//获得第二个操作数

}

num2 =Double.parseDouble(t2);//将第二个操作数转换为double

switch(op){

case '+': num1+=num2;break;

case '-': num1-=num2;break;

case '*': num1*=num2;break;

case '/': num1/=num2;break;

}

field.setText(s1+"="+num1+"");//显示在文本框里

}

else{//加减乘除符号

num1 = Double.parseDouble(field.getText());

field.setText(s1+str);

op = str.charAt(0);//获得操作符

}

}

public static void main(String[] args){

GUI frame = new GUI();

frame.setTitle("简易计算器");

frame.setLocationRelativeTo(null);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(300,200);

//frame.pack();

frame.setVisible(true);

}

}

不懂再问

如何用java做出左侧是菜单栏,单击,右侧可进行页面切换的效果,求源代码

1、网页：

（1）、用frameset加iframe

(2)、直接写好div+css，左侧导入菜单的页面（import/link），右侧导入不同的页面

2、PC端：

用东南西北中的那个布局 BorderLayout

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