开发环境：
1.结对伙伴:叶煜稳 博客：http://www.cnblogs.com/doubi2wy/
2.分工：我负责2.3阶段，我的小伙伴负责完善一下5.1的测试与封装
3.源代码：
import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; import java.awt.*; import javax.swing.*; import java.awt.event.*; import javax.swing.JFrame; public class est { public static void main(String [] args) { new MyWindow(); } } class MyWindow extends JFrame implements ActionListener{ Random r=new Random(); int result=0; float result1=0.2f,result2=0.2f; int m; int sum=0; int num=0; int num1=0; float num2=0.2f; int a=0,b=0; int q=0,w=0; float j=0.1f,k=0.1f; JLabel L1=new JLabel("请输入题数(最多不超过5题):"); JLabel L2=new JLabel("结果:"); JLabel L3=new JLabel(""); JTextField T1,T2,T3, T4; JButton B1,B2,B3; MyWindow(){ setTitle("四则运算"); this.setSize(300,150); T1=new JTextField(10); T2=new JTextField(10); T3=new JTextField(10); T4=new JTextField(10); B1=new JButton("确定"); B2=new JButton("确定"); B3=new JButton("下一题"); T1.addActionListener(this); T3.addActionListener(this); B1.addActionListener(this); B3.addActionListener(this); B2.addActionListener(this); setLayout(new FlowLayout(FlowLayout.CENTER,20,10)); add(L1); add(T1); add(B1); add(T2); add(B3); add(T3); add(B2); add(L2); add(T4); add(L3); setBounds(300,300,250,250); setResizable(true); setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource()==B1){ String str=T1.getText(); num=Integer.parseInt(str); if(num<=5){ m=(int)(Math.random()*4+1); if(m==3){ a=r.nextInt()%1000; b=r.nextInt()%1000; T2.setText(a+"+"+"("+b+")=?"); result=a+b; } else if(m==1){ q=r.nextInt()%1000; w=r.nextInt()%1000; T2.setText(q+"*"+"("+w+")"+"=?"); result1=q*w; } else if(m==2){ j=r.nextInt()%1000; k=r.nextInt()%1000; if(k==0) k++; T2.setText(j+"/"+"("+k+")"+"=?"); result2=(j/k); } num--; T1.setText(null); } else if(m==4){ a=r.nextInt()%1000; b=r.nextInt()%1000; T2.setText(a+"-"+"("+b+")=?"); result=a-b; } else{ T1.setText(null); T4.setText("重新输入!"); } } else if(e.getSource()==B3){ if(num>0){ m=(int)(Math.random()*4+1); if(m==3){ a=r.nextInt()%1000; b=r.nextInt()%1000; T2.setText(a+"+"+"("+b+")=?"); result=a+b; } else if(m==1){ q=r.nextInt()%1000; w=r.nextInt()%1000; T2.setText(q+"*"+"("+w+")"+"=?"); result1=q*w; } else if(m==2){ j=r.nextInt()%1000; k=r.nextInt()%1000; if(k==0) k++; T2.setText(j+"/"+"("+k+")"+"=?"); result2=(j/k); } else if(m==4){ a=r.nextInt()%1000; b=r.nextInt()%1000; T2.setText(a+"-"+"("+b+")=?"); result=a-b; } } else{ T2.setText("答题结束!!"); } num--; } else if(e.getSource()==B2){ if(m==3){ num1=Integer.parseInt(T3.getText()); if(num1==result){ T4.setText("回答正确!"); sum=sum+1; } else { T4.setText("回答错误!"+result); } T3.setText(null); } else if(m==1){ num1=Integer.parseInt(T3.getText()); if(num1==result1){ T4.setText("回答正确!"); sum=sum+1; } else { T4.setText("回答错误!"+result1); } T3.setText(null); } else if(m==2){ num2=(float)Double.parseDouble(T3.getText()); if(num2==result2){ T4.setText("回答正确!"); sum=sum+1; } else { T4.setText("回答错误!"+result2); } T3.setText(null); } else if(m==4){ num1=Integer.parseInt(T3.getText()); if(num1==result){ T4.setText("回答正确!"); sum=sum+1; } else { T4.setText("回答错误!"+result); } T3.setText(null); } } L3.setText("答对"+sum+"道!!"); } }
4.单元测试代码:
package Junit4; import java.util.Random; public class test { Random r=new Random(); private int result=0,result3=0; private int result1=0,result2=0; int m; int a=0,b=0; int q=0,w=0; int j=0,k=0; public void Unit()throws Exception{ m = (int)(Math.random()*4+1); a=r.nextInt()%1000; b=r.nextInt()%1000; q=r.nextInt()%1000; w=r.nextInt()%1000; j=r.nextInt()%1000; k=r.nextInt()%1000; if(m==3){ add(a,b); } else if(m==1){ Cheng(q,w); } else if(m==2){ Chu(j,k); } else if(m==4){ jian(a,b); } } public int add(int a,int b)throws Exception { if((b<-1000||b>1000)||(a<-1000||a>1000)) { throw new Exception("a,b的值超出范围"); } System.out.println(a+"+"+"("+b+")=?"); result=a+b; return result; } public int jian(int a,int b)throws Exception { if((b<-1000||b>1000)||(a<-1000||a>1000)) { throw new Exception("a,b的值超出范围"); } System.out.println(a+"-"+"("+b+")=?"); result3=a-b; return result3; } public int Cheng(int q,int w)throws Exception { if((q<-1000||q>1000)||(w<-1000||w>1000)) { throw new Exception("a,b的值超出范围"); } System.out.println(q+"*"+"("+w+")"+"=?"); result1=q*w; return result1; } public int Chu(int j,int k)throws Exception { if((j<-1000||j>1000)||(k<-1000||k>1000)) { throw new Exception("a,b的值超出范围"); } System.out.println(j+"/"+"("+k+")"+"=?"); if(k==0){ throw new Exception("除数不能为0"); } result2=j/k; return result2; } }
package Junit4test; import static org.junit.Assert.*; import junit.framework.Assert; import org.junit.Test; import Junit4.test; public class TTest{ @Test public void testAdd() { int z; try { z = new test().add(1,1); assertEquals(2,z); } catch (Exception e) { e.printStackTrace(); Assert.fail("没有抛出异常，测试失败"); } System.out.println("加法运算！"); } @Test public void testJian() { int z; try { z = new test().jian(2,1); assertEquals(1,z); } catch (Exception e) { e.printStackTrace(); Assert.fail("没有抛出异常，测试失败"); } System.out.println("减法运算！"); } @Test public void testCheng() { double z; try { z = new test().Cheng(2,3); assertEquals(6,(int)z); } catch (Exception e) { e.printStackTrace(); Assert.fail("没有抛出异常，测试失败"); } System.out.println("乘法运算！"); } @Test public void testChu(){ float z=0; try{ String r=null,r1=null; z=new test().Chu(3,1); r=String.valueOf(z); r1=String.valueOf(3.00); assertEquals(r1,r); } catch(Exception e){ e.printStackTrace(); Assert.fail("没有抛出异常，测试失败"); } System.out.println("除法运算！"); } }
测试结果：
代码覆盖：
异常处理：
改变一下a,b的值
public void testAdd() { int z; try { z = new test().add(1001,1001); assertEquals(2,z); } catch (Exception e) { e.printStackTrace(); Assert.fail("没有抛出异常，测试失败"); } System.out.println("加法运算！"); }
除数为0的时刻
public void testChu(){ float z=0; try{ String r=null,r1=null; z=new test().Chu(3,0); r=String.valueOf(z); r1=String.valueOf(3.00); assertEquals(r1,r); } catch(Exception e){ e.printStackTrace(); Assert.fail("没有抛出异常，测试失败"); } System.out.println("除法运算！"); }
5.负数运算：
总结：这次作业基本不知道怎么做，也是参考其他同学的博客，看别人怎么做就试着去
做，小伙伴一直鼓励和协助我完成这次作业，虽然不明确这次作业要做什么，但多少学到些东西！