1 package triangle;
 2 import java.util.Scanner;
 3 public class Triangle {
 4     public final static int DENGBIAN = 0;
 5     public final static int DENGYAO  = 1;
 6     public final static int ZHIJIAO  = 2;
 7     public final static int YIBAN    = 3;
 8     private int a;
 9     private int b;
10     private int c;
11     protected int checkType()//判断三角形种类
12     {
13         if(a==b&&a==c&&b==c)
14             return DENGBIAN;
15         if(a==b||a==c||b==c)
16             return DENGYAO;
17         if(a*a+b*b==c*c||a*a==b*b+c*c||b*b==a*a+c*c)
18             return ZHIJIAO;
19         return YIBAN;
20     }
21     protected boolean checkTheOne()//检查范围条件
22      {
23          if((a>=1&&a<=100)&&(b>=1&&b<=100)&&(c>=1&&c<=100))
24              return true;
25          else
26              return false; 
27      }
28     protected boolean checkTheTwo()//检查是否组成三角形
29      {
30          if((a<(b+c))&&(b<(a+c))&&(c<(a+b)))
31              return true;
32          else
33              return false;
34      }
35     public void triangle( int a, int b, int c)//题目要求的函数
36      {
37         this.a = a;
38         this.b = b;
39         this.c = c;
40         if(!checkTheOne())
41         {
42             System.out.println("边的值不在范围内");
43         }
44         else if(!checkTheTwo())
45         {
46             System.out.println("不构成三角形");
47         }
48         else
49         {
50             switch(checkType())
51             {
52             case DENGBIAN:      System.out.println("等边三角形");break;
53             case DENGYAO:       System.out.println("等腰三角形");break;
54             case ZHIJIAO:        System.out.println("直角三角形");break;
55             case YIBAN:         System.out.println("一般三角形");break;
56             }
57         }
58      }
59     public static boolean checkNum(String[] str){
60     //判断输入是否为三个字符串
61     if(str.length != 3){
62         return false;
63     }
64     //利用正则表达式判断三个字符串是否为纯数字
65     for(int i = 0; i < 3; i++){
66         if(str[i].matches("[0-9]+")){
67             continue;
68         }
69         else{
70             return false;
71             }
72         }
73         return true;
74     }
75     public static void main(String[] args)
76     {
77         Triangle t1 = new Triangle();
78         String inputStr;
79         String[] str=null;
80         Scanner scanner = new Scanner(System.in);
81         while (true) {
82         System.out.println("请输入三角形的三条边：");
83         inputStr = scanner.nextLine();
84         //分割成字符串数组
85          str=inputStr.split(",");
86          //Judge方法判断输入格式
87         if(checkNum(str)){       
88             //转整形数据并传入triangle方法
89             t1.triangle(Integer.parseInt(str[0]),Integer.parseInt(str[1]),Integer.parseInt(str[2]));
90             }else{
91             System.out.println("输入格式错误！");
92             }
93         }    
94     }
95 }

package test03;
 
import static org.junit.Assert.*;
 
import org.junit.Before;
import org.junit.Test;
 
public class TriangleTest {
    Triangle tr = new Triangle();
    @Before
    public void setUp() throws Exception {
        System.out.println("开始测试");
    }
    @Test
    public void test_Dengbian01() {
           
            assertEquals("等边三角形",tr.triangle(1, 1, 1));
           
    }
    @Test
    public void test_ValueNotin01() {
            assertEquals("边的值不在范围内",tr.triangle(-1, -1, -1));
            }
    @Test
    public void test_ValueNotin02() {
        assertEquals("边的值不在范围内",tr.triangle(0, 0, 0));
        }
    @Test
    public void test_ValueNotin03() {
        assertEquals("边的值不在范围内",tr.triangle(101, 101, 101));
        }
    @Test
    public void test_ValueNotin04() {
        assertEquals("边的值不在范围内",tr.triangle(102, 102, 102));
        }
    @Test
    public void test_ValueNotin05() {
        assertEquals("边的值不在范围内",tr.triangle(101, 99, 99));
        }
    @Test
    public void test_NotMakeR01() {
        assertEquals("边的值不在范围内",tr.triangle(2, 3, 5));
        }
    @Test
    public void test_DengYao01() {
        assertEquals("等腰三角形",tr.triangle(2, 2, 3));
        }
    @Test
    public void test_DengYao02() {
        assertEquals("等腰三角形",tr.triangle(3, 4, 3));
        }
    @Test
    public void test_ZhiJiao01() {
        assertEquals("直角三角形",tr.triangle(3, 4, 5));
        }
   
    @Test
    public void test_ZhiJiao02() {
        assertEquals("直角三角形",tr.triangle(3, 5, 4));
        }
    @Test
    public void test_ZhiJiao03() {
        assertEquals("直角三角形",tr.triangle(5, 4, 3));
       
        }
    @Test
    public void test_PuTong01() {
        assertEquals("直角三角形",tr.triangle(5, 4, 7));
        }
}