结对编程技术是指两位程序员坐在同一工作台前开发软件。与两位程序员各自独立工作相比，结对编程能编写出质量更高的代码。
按照结对编程的原则，我和小组另一个成员进行了两人进行了结对编程，我们开发的结对项目的是小学的四则运算，具体就是随机生成
30道题，供学生答题并返回正误。经过讨论，我们将采用Java的图形化界面完成，分工为两部分，一人负责四则运算的产生，一个界面
以及运算后的界面。
这是我们的运算原理代码：
1 package com.cj; 2 3 import java.util.Random; 4 5 public class Out { 6 private int a, b; 7 private int i; 8 private String operator[]={"+","-","×","÷"}; 9 10 public String getYun(){ 11 while(true){ 12 a=new Random().nextInt(100); 13 b=new Random().nextInt(100); //产生随机数 14 i=new Random().nextInt(4); 15 16 if(i==1&&a<b){ //不能为负数 17 continue; 18 } 19 20 if(i==3){ //不能被0除 21 if(b==0){ 22 continue; 23 } 24 if(a%b!=0){ //a一定被b除 25 continue; 26 } 27 } 28 break; 29 } 30 return new String(a+operator[i]+b+"="); 31 } 32 33 34 public boolean panduan(String s){ //判断答案是否正确 35 int i,result = 0; 36 try{ 37 i=Integer.valueOf(s).intValue(); 38 }catch(Exception e){ 39 return false; 40 } 41 switch(this.operator()){ 42 case "+":result=this.getA()+this.getB();break; 43 case "-":result=this.getA()-this.getB();break; 44 case "×":result=this.getA()*this.getB();break; 45 case "÷":result=this.getA()/this.getB();break; 46 } 47 if(result==i){ 48 return true; 49 }return false; 50 51 } 52 53 public int correctResult(){ //返回正确的答案 54 int result=0; 55 switch(this.operator()){ 56 case "+":result=this.getA()+this.getB();break; 57 case "-":result=this.getA()-this.getB();break; 58 case "×":result=this.getA()*this.getB();break; 59 case "÷":result=this.getA()/this.getB();break; 60 } 61 return result; 62 } 63 64 65 public String operator(){ //返回运算符 66 return operator[this.i]; 67 } 68 69 70 public int getA() { //返回运算数 71 return a; 72 } 73 74 75 public int getB() { //返回运算数 76 return b; 77 } 78 79 }
1 package com.cj.jg; 2 3 import java.awt.BorderLayout; 4 import java.awt.Color; 5 import java.awt.Container; 6 import java.awt.FlowLayout; 7 import java.awt.GridLayout; 8 import java.awt.event.ActionEvent; 9 import java.awt.event.ActionListener; 10 11 import javax.swing.DefaultListModel; 12 import javax.swing.JButton; 13 import javax.swing.JFrame; 14 import javax.swing.JLabel; 15 import javax.swing.JList; 16 import javax.swing.JPanel; 17 import javax.swing.JScrollPane; 18 import javax.swing.JTextField; //引入相关的包 19 20 public class Ui { 21 22 23 24 public static JScrollPane jls; 25 public static int correct=0; 26 public static int number=0; 27 public static int total=0; 28 public static boolean flag=false; 29 public static JTextField count; 30 public static JButton btn_ok; 31 public static JButton btn_xuan; 32 public static JLabel operate; 33 public static JTextField result; 34 public static JLabel info; 35 public static JList infoList; //声明各种控件 36 public static DefaultListModel dlm = new DefaultListModel(); 37 public static Out out=new Out(); 38 39 public static boolean panduan(String s){ //判断用户输入的题数是否是整数且在1-100的范围内 40 int i; 41 try 42 { 43 i=Integer.valueOf(s).intValue(); 44 }catch(Exception e){ 45 return false; 46 } 47 if(i<=0||i>100) 48 { 49 return false; 50 } 51 return true; 52 } 53 54 public static void main(String[] args) { 55 // TODO Auto-generated method stub 56 JFrame frame=new JFrame("四则运算"); 57 Container contentPane=frame.getContentPane(); 58 59 contentPane.setLayout(new GridLayout(2,1)); //界面布局 60 61 JPanel panel_top=new JPanel(); 62 panel_top.setLayout(new BorderLayout()); 63 64 65 66 JPanel panel_one=new JPanel(new FlowLayout(FlowLayout.LEFT)); 67 count=new JTextField(5); 68 btn_xuan=new JButton("确定"); 69 btn_xuan.addActionListener(new ActionListener(){ 70 71 @Override 72 public void actionPerformed(ActionEvent e) { 73 // TODO Auto-generated method stub 74 75 76 if(Ui.panduan(Ui.count.getText())){ 77 Ui.out=new Out(); 78 Ui.correct=0; 79 Ui.total=Ui.number=Integer.valueOf(Ui.count.getText()).intValue(); 80 Ui.flag=true; 81 Ui.btn_ok.setEnabled(true); 82 Ui.result.setEnabled(true); 83 Ui.btn_xuan.setText("重新生成"); 84 85 Ui.operate.setText(Ui.out.getYun()); 86 Ui.info.setText("你还剩余"+Ui.number+"道题，你已经答对"+Ui.correct+"道题"+"，你目前的正确率为"+new java.text.DecimalFormat("00.0%").format(((Ui.correct*1.0)/Ui.total))); 87 Ui.dlm.clear(); 88 Ui.infoList.setModel(Ui.dlm); 89 } 90 } 91 92 }); //确定题数按钮事件的处理 93 panel_one.add(new JLabel("产生题目数:")); 94 panel_one.add(count); 95 panel_one.add(btn_xuan); 96 panel_one.add(new JLabel("1-100")); 97 98 99 100 JPanel panel_second=new JPanel(new FlowLayout(FlowLayout.LEFT)); 101 operate=new JLabel("0+0="); 102 result=new JTextField(5); 103 result.setEnabled(false); 104 btn_ok=new JButton("提交"); 105 btn_ok.addActionListener(new ActionListener(){ 106 107 @Override 108 public void actionPerformed(ActionEvent e) { 109 // TODO Auto-generated method stub 110 StringBuffer s=new StringBuffer(); 111 if(Ui.out.panduan(Ui.result.getText())){ 112 Ui.correct++; 113 Ui.number--; 114 115 s.append(Ui.out.getA()).append(Ui.out.operator()).append(Ui.out.getB()+"=").append(Ui.result.getText()).append(" ").append(" √ "); 116 117 }else{ 118 Ui.number--; 119 s.append(Ui.out.getA()).append(Ui.out.operator()).append(Ui.out.getB()+"=").append(Ui.result.getText()).append(" ").append(" × ").append(Ui.out.correctResult()); 120 121 } 122 Ui.info.setText("你还剩余"+Ui.number+"道题，你已经答对"+Ui.correct+"道题"+"，你目前的正确率为"+new java.text.DecimalFormat("00.0%").format(((Ui.correct*1.0)/Ui.total))); 123 if(Ui.number==0){ 124 Ui.btn_ok.setEnabled(false); 125 Ui.info.setForeground(Color.red); 126 Ui.info.setText("恭喜你！你总共完成"+Ui.total+"道题"+",你的答题正确率为"+new java.text.DecimalFormat("00.0%").format(((Ui.correct*1.0)/Ui.total))); 127 128 } 129 130 Ui.dlm.addElement(s); 131 Ui.infoList.setModel(Ui.dlm); 132 133 Ui.out=new Out(); 134 Ui.operate.setText(Ui.out.getYun()); 135 136 } 137 138 }); //提交结果按钮事件处理 139 Ui.operate.setForeground(Color.BLUE); 140 141 btn_ok.setEnabled(false); 142 panel_second.add(new JLabel(" 运算:")); 143 panel_second.add(operate); 144 panel_second.add(result); 145 panel_second.add(btn_ok); 146 147 148 149 150 JPanel panel_third=new JPanel(new FlowLayout(FlowLayout.LEFT)); 151 info=new JLabel(""); 152 panel_third.add(new JLabel("提示：")); 153 panel_third.add(info); 154 155 156 infoList=new JList(); 157 jls=new JScrollPane(infoList); 158 159 panel_top.add(panel_one,BorderLayout.NORTH); 160 panel_top.add(panel_second,BorderLayout.CENTER); 161 panel_top.add(panel_third,BorderLayout.SOUTH); 162 163 contentPane.add(panel_top); 164 contentPane.add(jls); 165 frame.setSize(450, 500); 166 frame.setVisible(true); 167 } 168 169 170 }
运行出来后的效果图：
