描述短路现象   

 

public class test1 {
private static int a = 0;

public static void main(String[] args) {
System.out.println("1");
if(a == 0 && boolRelated());
System.out.println("2");
if(a == 1 && boolRelated());
System.out.println("3");
if(a == 0 || boolRelated());
System.out.println("4");
if(a == 1 || boolRelated());
}
 
public static boolean boolRelated() {
System.out.println("test");
return true;
}

}

a == 0为真，判断符为&&，则继续执行boolRelated()方法
a == 1为假，判断符为&&，不再执行boolRelated()方法
a == 0为真，判断符为||，不再执行boolRelated()方法
a == 1为假，判断符为||，则继续执行boolRelated()方法