UC

public class Test{
    public static void main(String args[]){
        int i[]= new int[1];
        System.out.println(i.equals(0));
        
    }
}
//false

 

import static org.junit.Assert.*;
import org.junit.Test;
public class test {
    @Test
        public void test(){
            int i[]= new int[1];
//            assertNotNull/Null
//            assertSame/NotSame 指向同一内存地址（实例）
//            fail([String message])中断测试方法，输出message.让测试失败，并给出指定信息。
            assertFalse(i.equals(0));//false
            assertEquals(i[0],0);//true
            
        }
}

 

public class Test2{
    public static void main(String args[]){
        int i = Integer.MAX_VALUE;
        long j = i+1;
        System.out.println(j>i);
        System.out.println(j);
        System.out.println(i);
        
    }
}
//false
//-2147483648
//2147483647

 

public class Test{
    public static void main(String args[]){
        B b=new B();
        b.printValue(1);
        System.out.println(b.i);//0
    }
}
class B {
    int i=0;
    public void printValue(int i){
        i=i;
    }
}

 

class B {
        int i=0;
        int j=0;
        public void printValueI(int i){
            this.i=i;
        }
        public void printValueJ(int j){
            j=j;
        }
    }
    @Test//通过测试
    public void test2(){
        B b=new B();
        b.printValueI(1);
        assertEquals(b.i, 1);
        b.printValueJ(1);
        assertEquals(b.j, 0);
    }