Java GUI编写一个简单的抽奖机

功能简述:
1.可以选择本机上的名单进行抽奖，（名单需为txt文件，且文件中的名字需用空格隔开）
2.手动模式：手动控制开始与结束
3.自动模式：可以选择一/二/三等奖(人数可以自行设置)
4.可保存抽奖结果

界面:

首先要在当前Java目录下新建两个文件夹，分别用来存放抽奖名单和背景图片

代码:

//ExtractInterface.java  主界面
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;

public class ExtractInterface extends JFrame{

	JButton startButton;//开始
	JButton endButton;//停止
	JButton chooseButton;//选择文件
	JButton setButton;//设置获奖人数
	JLabel fileName;//文件名标签
	JLabel peopleNum;//人数
	JPanel showPriceJp;
	JTextField showField;//显示姓名的文本框
	JTextField AshowPrice1;//(自动)显示一等奖获奖名单
	JTextField AshowPrice2;//(自动)显示二等奖获奖名单
	JTextField AshowPrice3;//(自动)显示三等奖获奖名单
	JTextField MshowPrice1;//(手动)显示获奖名单
	JTextField MshowPrice2;
	JTextField MshowPrice3;
	JTextField showFile;//显示文件名的文本框
	JTextField numField;//显示人数
	JComboBox<String> modeBox;//模式选择
	JMenuBar menuBar;//菜单栏
	JMenu menu;//菜单
	JMenuItem about;//关于
	JMenuItem restart;//重新开始
	JMenuItem savefile;//保存中奖名单
	JRadioButton firstPrice;//一等奖
	JRadioButton secondPrice;//二等奖
	JRadioButton thirdPrice;//三等奖
	JFileChooser fileDialog;//文件对话框

	String[] nameData1;//存放名单的数组(手动)
	String[] nameData2;
	StringBuffer Mawardlist=new StringBuffer("");//存放中奖名单(手动)
	StringBuffer Aawardlist1=new StringBuffer("");//存放一等奖名单(自动)
	StringBuffer Aawardlist2=new StringBuffer("");//存放二等奖名单(自动)
	StringBuffer Aawardlist3=new StringBuffer("");//存放三等奖名单(自动)
	
	boolean isstart=false;//判断开始按钮是否已经按下
	boolean AUTO_OR_MAN=false;//判断是什么模式  true:手动  false:自动
	boolean isload=false;//判断是否已经载入文件
	boolean isfp=false;//判断一等奖是否已经抽出
	boolean issp=false;//判断二等奖是否已经抽出
	boolean istp=false;//判断三等奖是否已经抽出
	int restlength;//有效抽奖人数(手动)
	int restlength2;//有效抽奖人数(自动)
	int luckycount=0;//已中奖人数(手动)
	Color co=new Color(245,219,175);//颜色
	
	static int fnum=1;//一等奖人数
	static int snum=2;//二等奖人数
	static int tnum=3;//三等奖人数
	
	File Afile=new File("list/AutoList.txt");//保存抽奖名单的文件(自动)
	File Mfile=new File("list/ManList.txt");//保存抽奖名单的文件(手动)
	
	BufferedWriter bw=null;
	
	ExtractInterface(){
		setLayout(null);//设置布局
		
		Font f=new Font("宋体",Font.BOLD,40);//字体
		Font f2=new Font("宋体",Font.BOLD,20);
		Font f3=new Font("宋体",Font.BOLD,15);
				
		//设置背景
		BackGroundPanel bgp=new BackGroundPanel(new ImageIcon("images/background.png").getImage());
		bgp.setBounds(0,0,700,800);
		
		//菜单栏
		menuBar=new JMenuBar();
		menu=new JMenu("菜单");
		restart=new JMenuItem("重新开始");
		about=new JMenuItem("关于");
		savefile=new JMenuItem("保存抽奖结果");
		menu.add(restart);
		menu.add(savefile);
		menu.add(about);
		menuBar.add(menu);
		setJMenuBar(menuBar);
		
		//模式
		modeBox=new JComboBox<String>(new String[] {"自动抽奖","手动抽奖"});
		modeBox.setBounds(20,20,100,30);
		modeBox.setBackground(co);
		bgp.add(modeBox);
		
		//显示姓名的文本框
		showField=new JTextField("");
		showField.setBounds(218,105,297,179);//设置位置大小
		showField.setEditable(false);//设置不可编辑
		showField.setHorizontalAlignment(JTextField.CENTER);//文本居中
		showField.setFont(f);
		showField.setOpaque(false);
		bgp.add(showField);
		
		//获奖名单
		AshowPrice1=new JTextField();
		AshowPrice1.setBounds(76,629,594,44);
		AshowPrice1.setEditable(false);//设置不可编辑
		AshowPrice1.setHorizontalAlignment(JTextField.CENTER);//文本居中
		AshowPrice1.setFont(f2);
		AshowPrice1.setOpaque(false);
		AshowPrice1.setBorder(BorderFactory.createEmptyBorder());//隐藏边框
		AshowPrice2=new JTextField();
		AshowPrice2.setBounds(76,673,594,43);
		AshowPrice2.setEditable(false);//设置不可编辑
		AshowPrice2.setHorizontalAlignment(JTextField.CENTER);//文本居中
		AshowPrice2.setFont(f2);
		AshowPrice2.setOpaque(false);
		AshowPrice2.setBorder(BorderFactory.createEmptyBorder());//隐藏边框
		AshowPrice3=new JTextField();
		AshowPrice3.setBounds(76,716,594,46);
		AshowPrice3.setEditable(false);//设置不可编辑
		AshowPrice3.setHorizontalAlignment(JTextField.CENTER);//文本居中
		AshowPrice3.setFont(f2);
		AshowPrice3.setOpaque(false);
		AshowPrice3.setBorder(BorderFactory.createEmptyBorder());//隐藏边框
		
		MshowPrice1=new JTextField();
		MshowPrice1.setBounds(76,629,594,44);
		MshowPrice1.setEditable(false);//设置不可编辑
		MshowPrice1.setHorizontalAlignment(JTextField.CENTER);//文本居中
		MshowPrice1.setFont(f2);
		MshowPrice1.setOpaque(false);
		MshowPrice1.setBorder(BorderFactory.createEmptyBorder());//隐藏边框
		MshowPrice2=new JTextField();
		MshowPrice2.setBounds(76,673,594,43);
		MshowPrice2.setEditable(false);//设置不可编辑
		MshowPrice2.setHorizontalAlignment(JTextField.CENTER);//文本居中
		MshowPrice2.setFont(f2);
		MshowPrice2.setOpaque(false);
		MshowPrice2.setBorder(BorderFactory.createEmptyBorder());//隐藏边框
		MshowPrice3=new JTextField();
		MshowPrice3.setBounds(76,716,594,46);
		MshowPrice3.setEditable(false);//设置不可编辑
		MshowPrice3.setHorizontalAlignment(JTextField.CENTER);//文本居中
		MshowPrice3.setFont(f2);
		MshowPrice3.setOpaque(false);
		MshowPrice3.setBorder(BorderFactory.createEmptyBorder());//隐藏边框
		bgp.add(AshowPrice1);
		bgp.add(AshowPrice2);
		bgp.add(AshowPrice3);

	
		//从本机中读取文件
		fileName=new JLabel("文件名：");
		showFile=new JTextField();
		chooseButton=new JButton("选择文件");
		startButton=new JButton("开始");
		endButton=new JButton("结束");
		peopleNum=new JLabel("人数：");
		numField=new JTextField();
		fileName.setBounds(110,425,100,35);
		showFile.setBounds(175,425,200,35);
		chooseButton.setBounds(390,425,100,35);
		peopleNum.setBounds(500,425,60,35);
		numField.setBounds(540,425,60,35);
		startButton.setBounds(333,530,100,50);
		endButton.setBounds(400,508,100,50);
		fileName.setFont(f3);
		showFile.setFont(f3);
		numField.setFont(f3);
		chooseButton.setFont(f3);
		startButton.setFont(f3);
		endButton.setFont(f3);
		startButton.setBackground(co);
		endButton.setBackground(co);
		chooseButton.setBackground(co);
		
		//设置按钮
		setButton=new JButton("设置人数");
		setButton.setBounds(20,65,100,30);
		setButton.setFont(f3);
		setButton.setBackground(co);
		bgp.add(setButton);
	
		showFile.setEditable(false);//设置不可编辑
		numField.setEditable(false);//设置不可编辑
		bgp.add(fileName);
		bgp.add(showFile);
		bgp.add(chooseButton);
		bgp.add(peopleNum);
		bgp.add(numField);
		bgp.add(startButton);
		
		//奖项选择
		firstPrice=new JRadioButton("一等奖");
		secondPrice=new JRadioButton("二等奖");
		thirdPrice=new JRadioButton("三等奖");
		firstPrice.setBounds(233,470,100,50);
		secondPrice.setBounds(333,470,100,50);
		thirdPrice.setBounds(433,470,100,50);
		firstPrice.setOpaque(false);//设置背景透明
		secondPrice.setOpaque(false);
		thirdPrice.setOpaque(false);
		ButtonGroup group=new ButtonGroup();//使单选框互斥
		group.add(firstPrice);
		group.add(secondPrice);
		group.add(thirdPrice);	
		bgp.add(firstPrice);
		bgp.add(secondPrice);
		bgp.add(thirdPrice);
		
		
		//添加事件
		restart.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				showField.setText("");
				AshowPrice1.setText("");
				AshowPrice2.setText("");
				AshowPrice3.setText("");
				MshowPrice1.setText("");
				MshowPrice2.setText("");
				MshowPrice3.setText("");
				numField.setText("");
				showFile.setText("");
				isstart=false;//判断开始按钮是否已经按下
				isload=false;//判断是否已经载入文件
				isfp=false;//判断一等奖是否已经抽出
				issp=false;//判断二等奖是否已经抽出
				istp=false;//判断三等奖是否已经抽出
				luckycount=0;
				fnum=1;
				snum=2;
				tnum=3;
				Mawardlist=new StringBuffer("");
				Aawardlist1=new StringBuffer("");
				Aawardlist2=new StringBuffer("");
				Aawardlist3=new StringBuffer("");
				JOptionPane.showMessageDialog(bgp,"初始化完毕","提示",JOptionPane.INFORMATION_MESSAGE);
			}			
		});
		about.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog(bgp,"\n1.txt文件内容要以空格隔开才能被正确读取"					
						+ "\n2.共有两个模式\n   手动模式：手动控制开始与结束\n   自动模式：可以选择一/二/三等奖(人数可以自行设置)"
						+ "\n3.抽奖结果默认保存在本目录下的list/ManList.txt和list/AutoList.txt中   "
						,"关于",JOptionPane.PLAIN_MESSAGE);	
			}	
		});
		savefile.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if(AUTO_OR_MAN) {//手动
					if(Mawardlist.toString().equals(""))JOptionPane.showMessageDialog(bgp,"暂无抽奖结果!","提示",JOptionPane.WARNING_MESSAGE);
					else {
						try (BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(Mfile)))) {
							bw.write("获奖名单:");
							bw.newLine();
							String[] temp=Mawardlist.toString().split(" ");
							for(int i=0;i<temp.length;++i) {
								bw.write(temp[i]+" ");
								if((i+1)%8==0)bw.newLine();
							}
							JOptionPane.showMessageDialog(bgp,"结果保存至list目录中","提示",JOptionPane.PLAIN_MESSAGE);
						} catch (Exception ex) {
							ex.printStackTrace();
						}
					}
				}else {//自动
					
					try (BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(Afile)))) {
						if(!Aawardlist1.toString().equals("")||!Aawardlist2.toString().equals("")
								||!Aawardlist3.toString().equals("")) {
							bw.write("获奖名单:");
							String[] temp;
							if(!Aawardlist1.toString().equals("")) {
								bw.newLine();
								bw.write("一等奖:");
								temp=Aawardlist1.toString().split(" ");
								for(int i=0;i<temp.length;++i) bw.write(temp[i]+" ");
							}
							if(!Aawardlist2.toString().equals("")) {
								bw.newLine();
								bw.write("二等奖:");
								temp=Aawardlist2.toString().split(" ");
								for(int i=0;i<temp.length;++i) bw.write(temp[i]+" ");	
							}
							if(!Aawardlist3.toString().equals("")) {
								bw.newLine();
								bw.write("三等奖:");
								temp=Aawardlist3.toString().split(" ");
								for(int i=0;i<temp.length;++i) bw.write(temp[i]+" ");
							}
							JOptionPane.showMessageDialog(bgp,"结果已保存至list目录中","提示",JOptionPane.PLAIN_MESSAGE);
						}else JOptionPane.showMessageDialog(bgp,"暂无抽奖结果!","提示",JOptionPane.WARNING_MESSAGE);
					} catch (Exception ex) {
						ex.printStackTrace();
					}			
				}
			}	
		});
		
		modeBox.addItemListener(new ItemListener() {
			@Override
			public void itemStateChanged(ItemEvent e) {	
				if(modeBox.getSelectedItem().toString()=="自动抽奖") {
					AUTO_OR_MAN=false;
					showField.setText("");
					
					if(bgp.isAncestorOf(endButton)) {
						startButton.setBounds(333,530,100,50);
						bgp.remove(endButton);
					 }
					if(!bgp.isAncestorOf(firstPrice)) {
						bgp.add(firstPrice);	
						bgp.add(secondPrice);			
						bgp.add(thirdPrice);
					}
					if(!bgp.isAncestorOf(setButton)) {
						bgp.add(setButton);
					}
					if(!bgp.isAncestorOf(AshowPrice1)) {
						bgp.add(AshowPrice1);
						bgp.add(AshowPrice2);
						bgp.add(AshowPrice3);
						bgp.remove(MshowPrice1);
						bgp.remove(MshowPrice2);
						bgp.remove(MshowPrice3);
					}
				    bgp.updateUI();
				}else {//手动抽奖
					AUTO_OR_MAN=true;
					showField.setText("");
					if(!bgp.isAncestorOf(endButton)) {
						startButton.setBounds(230,508,100,50);
						bgp.add(endButton);
					}
					if(bgp.isAncestorOf(firstPrice)) {
						bgp.remove(firstPrice);
						bgp.remove(secondPrice);
						bgp.remove(thirdPrice);
					}
					if(bgp.isAncestorOf(setButton)) {
						bgp.remove(setButton);
					}
					if(!bgp.isAncestorOf(MshowPrice1)) {
						bgp.add(MshowPrice1);
						bgp.add(MshowPrice2);
						bgp.add(MshowPrice3);
						bgp.remove(AshowPrice1);
						bgp.remove(AshowPrice2);
						bgp.remove(AshowPrice3);
					}
					bgp.updateUI();
				}
				
			}});
		chooseButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				fileDialog=new JFileChooser();
				fileDialog.setCurrentDirectory(new File("."));//设置默认打开目录为当前目录
				fileDialog.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);//只可以打开文件和文件夹
				fileDialog.setMultiSelectionEnabled(false);//是否允许多选		
				int state=fileDialog.showOpenDialog(getContentPane());
				if(state==JFileChooser.APPROVE_OPTION) {
					File dir=fileDialog.getSelectedFile();
					showFile.setText(dir.getName());//把文件名显示出来
					try {//读文件
						FileInputStream fr=new FileInputStream(dir.getPath());
						InputStreamReader is = new InputStreamReader(fr, "UTF-8");
						BufferedReader in=new BufferedReader(is);
						nameData1=in.readLine().split(" ");
						nameData2=nameData1.clone();
						showField.setText("已准备就绪");
						numField.setText(nameData1.length+"");
						isload=true;
						restlength=nameData1.length;
						restlength2=restlength;
					} catch (Exception e1) {
						e1.printStackTrace();
					}
				}
			}
		});
		startButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if(isload) {
					if(!AUTO_OR_MAN) {//自动
						new Thread(new Runnable() {
							@Override
							public void run() {
							if(firstPrice.isSelected()&&!isfp) {
								isfp=true;
								for(int l=0;l<fnum;++l) {
									int j = 0;
									for(int i=0;i<20;++i) {
										j=(int)(Math.random()*restlength2);
										showField.setText(nameData2[j]);
										try {
											if(i<10)Thread.sleep(130);//快速轮换
											else Thread.sleep(i*20);//逐渐减慢至停止
										} catch (InterruptedException e) {
											e.printStackTrace();
										}
									}		
									if(l==0)AshowPrice1.setText("一等奖："+nameData2[j]);
									else AshowPrice1.setText(AshowPrice1.getText()+" "+nameData2[j]);
									Aawardlist1.append(nameData2[j]+" ");
									nameData2[j]=nameData2[--restlength2];	
									try {
										Thread.sleep(1600);
									} catch (InterruptedException e) {
										e.printStackTrace();
									}
								}			
							}else if(secondPrice.isSelected()&&!issp) {
								issp=true;
								for(int l=0;l<snum;++l) {
									int j = 0;
									for(int i=0;i<20;++i) {
										j=(int)(Math.random()*restlength2);
										showField.setText(nameData2[j]);
										try {
											if(i<10)Thread.sleep(130);//快速轮换
											else Thread.sleep(i*20);//逐渐减慢至停止
										} catch (InterruptedException e) {
											e.printStackTrace();
										}
									}		
									if(l==0)AshowPrice2.setText("二等奖："+nameData2[j]);
									else AshowPrice2.setText(AshowPrice2.getText()+" "+nameData2[j]);
									Aawardlist2.append(nameData2[j]+" ");
									nameData2[j]=nameData2[--restlength2];	
									try {
										Thread.sleep(1600);
									} catch (InterruptedException e) {
										e.printStackTrace();
									}
								}
							}else if(thirdPrice.isSelected()&&!istp) {
								istp=true;
								for(int l=0;l<tnum;++l) {
									int j = 0;
									for(int i=0;i<20;++i) {
										j=(int)(Math.random()*restlength2);
										showField.setText(nameData2[j]);
										try {
											if(i<10)Thread.sleep(130);//快速轮换
											else Thread.sleep(i*20);//逐渐减慢至停止
										} catch (InterruptedException e) {
											e.printStackTrace();
										}
									}		
									if(l==0)AshowPrice3.setText("三等奖："+nameData2[j]);
									else AshowPrice3.setText(AshowPrice3.getText()+" "+nameData2[j]);
									Aawardlist3.append(nameData2[j]+" ");
									nameData2[j]=nameData2[--restlength2];	
									try {
										Thread.sleep(1600);
									} catch (InterruptedException e) {
										e.printStackTrace();
									}
								}
							}else {
								if(!firstPrice.isSelected()&&!secondPrice.isSelected()&&!thirdPrice.isSelected())JOptionPane.showMessageDialog(bgp,"请选择要抽取的奖项","提示",JOptionPane.WARNING_MESSAGE);
								else JOptionPane.showMessageDialog(bgp,"该奖项已抽完","提示",JOptionPane.WARNING_MESSAGE);
							}
						  }	
						}).start();			
					}else {//手动
						if(!isstart&&restlength>0) {
							isstart=true;
							new Thread(new Runnable() {
								@Override
								public void run() {
								int i=0;
								while(isstart) {
									if(i==restlength)i=0;
									showField.setText(nameData1[i++]);
									try {
										Thread.sleep(100);
									} catch (InterruptedException e) {
										e.printStackTrace();
									}
								}
								if(luckycount/8==0)MshowPrice1.setText(MshowPrice1.getText()+" "+showField.getText());
								else if(luckycount/8==1)MshowPrice2.setText(MshowPrice2.getText()+" "+showField.getText());
								else MshowPrice3.setText(MshowPrice3.getText()+" "+showField.getText());
								Mawardlist.append(nameData1[i-1]+" ");
								nameData1[i-1]=nameData1[restlength-1];//把最后的那个提到已经被抽过的位置		
								restlength--;
								luckycount++;
								}	
							}).start();
						}else {
							if(restlength<=0)JOptionPane.showMessageDialog(bgp,"已抽完！","提示",JOptionPane.WARNING_MESSAGE);
							else JOptionPane.showMessageDialog(bgp,"请先结束！","提示",JOptionPane.WARNING_MESSAGE);
						}
					}
				}else JOptionPane.showMessageDialog(bgp,"请先载入文件","提示",JOptionPane.WARNING_MESSAGE);
			}		
		});
		endButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if(isstart)isstart=false;
				else JOptionPane.showMessageDialog(bgp,"请先开始","提示",JOptionPane.WARNING_MESSAGE);
			}
		});
		setButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				new AwardSetting(fnum,snum,tnum);
			}		
		});
		
		
		add(bgp);
		setSize(700,856);
		setLocation(600,100);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setVisible(true);
		setResizable(false);
	}
	public static void main(String[] args) {
		new ExtractInterface();
	}
}
//设置背景
class BackGroundPanel extends JPanel{
	Image im;
	BackGroundPanel(Image im){
		setLayout(null);
		this.im=im;
		setOpaque(true);
	}
	public void paintComponent(Graphics g) {
		super.paintComponents(g);
		g.drawImage(im,0,0,this.getWidth(),this.getHeight(),this);
	}
}

//AwardSetting.java 人数设置
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class AwardSetting extends JFrame{

	JLabel flabel;
	JLabel slabel;
	JLabel tlabel;
	JComboBox<Integer> fBox;//一等奖人数
	JComboBox<Integer> sBox;//二等奖人数
	JComboBox<Integer> tBox;//三等奖人数
	JButton comButton;//确定按钮
	AwardSetting(int fnum,int snum,int tnum){
		setLayout(new FlowLayout(FlowLayout.CENTER,10,20));//布局
		Font f=new Font("宋体",Font.BOLD,15);//字体
		Color co=new Color(245,219,175);//颜色
		
		flabel=new JLabel("一等奖:");
		slabel=new JLabel("二等奖:");
		tlabel=new JLabel("三等奖:");
		
		fBox=new JComboBox<Integer>(new Integer[] {1,2,3,4,5,6,7,8});
		sBox=new JComboBox<Integer>(new Integer[] {1,2,3,4,5,6,7,8});
		tBox=new JComboBox<Integer>(new Integer[] {1,2,3,4,5,6,7,8});
		
		comButton=new JButton("确定");
		comButton.setPreferredSize(new Dimension(80,30));
		comButton.setFont(f);
		comButton.setBackground(co);
		
		
		//设置默认值
		fBox.setSelectedItem(fnum);
		sBox.setSelectedItem(snum);
		tBox.setSelectedItem(tnum);
		
		//设置字体
		flabel.setFont(f);
		slabel.setFont(f);
		tlabel.setFont(f);
		//设置颜色
		fBox.setBackground(co);
		sBox.setBackground(co);
		tBox.setBackground(co);
		
		add(flabel);
		add(fBox);
		add(slabel);
		add(sBox);
		add(tlabel);
		add(tBox);
		add(comButton);
		
		comButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				int fnum=Integer.parseInt(fBox.getSelectedItem().toString());
				int snum=Integer.parseInt(sBox.getSelectedItem().toString());
				int tnum=Integer.parseInt(tBox.getSelectedItem().toString());
				ExtractInterface.fnum=fnum;
				ExtractInterface.snum=snum;
				ExtractInterface.tnum=tnum;	
				dispose();
			}		
		});
		
		setSize(420,150);
		setLocation(600,100);
		setVisible(true);
		setResizable(false);
	}
}

背景图片:

整个程序的布局是空布局，全是通过坐标来设置各个组件的位置的，适合窗口大小固定的情况。
学Java没多久，代码质量还不是很高，有很多地方可以还是可以改进的。