在Eclipse中配置Junit的方法：

在Eclipse中配置Junit的方法：
1、 在要使用Junit的project名上，点击properties--java build path-libraries, 点击Add library,选择Junit即可。点击Add library，在弹出的对话框中选择Jnuit，接下来选择junit版本即可。
public class Calculator {   
　　public int add(int a,int b) 
           return a+b;
    }
    public int minus(int a,int b) {
           return a-b;
    }
    public int multiply(int a,int b) {
           return a*b;
    }
    public int divide(int a,int b) {
           return a/b;
    }
}
Junit测试类：
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class CalculatorTest {
       @Before
       public void setUp() throws Exception {
       }
       @Test
       public void testAdd() {
              //实例化一个对象
              Calculator c = new Calculator();
              //对象调用被侧方法及传参
              int result = c.add(2, 5);
              //使用断言比较预期结果和实际结果
              assertEquals(7,result,0.0);
              //Assert.assertEquals(7, result);
              //fail("Not yet implemented");
       }
       @Test
       public void testMinus() {
              //fail("Not yet implemented");
              Calculator c = new Calculator();
              int result = c.minus(2, 5);
              assertEquals(-3,result,0.0);
       }
       @Test
       public void testMultiply() {
              //fail("Not yet implemented");
              Calculator c = new Calculator();
              int result = c.multiply(2, 5);
              assertEquals(10,result,0.0);
       }
       @Test
       public void testDivide() {
              //fail("Not yet implemented");
              Calculator c = new Calculator();
              int result = c.divide(10, 5);
              assertEquals(2,result);
       }
}