java笔试题（面试题）系列之一

Posted 2020-09-29

1）

1 public class Test01 {
2 
3     public static void main(String[] args) {
4         int a = 5;
5         System.out.println("value is " + ((a<5)?10.9:9));
6     }
7 
8 }

输出结果为：9.0

分析：因为有10.9，所以会发生数据类型自动转换，9自动转换为9.0，因此输出结果为9.0.具体数据类型转换详解，请查看本人博客http://www.cnblogs.com/XuGuobao/p/7229881.html

2）

 1 public class Test03 {
 2 
 3     public static void main(String[] args) {
 4         int m = 5,n = 5;
 5         if((m != 5) && (n++ == 5)){}
 6         System.out.println("a." +n);
 7         
 8         m = n = 5;
 9         if((m != 5) & (n++ == 6)){}
10         System.out.println("b." +n);
11         
12         m = n =5;
13         if((m == 5) || (n++ == 5)){}
14         System.out.println("c." +n);
15         
16         m = n =5;
17         if((m == 5) | (n++ == 6)){}
18         System.out.println("d." +n);
19         
20         int a = 1,b = 2;
21         int c = a & b;
22         System.out.println("a % b" +c);
23     }
24 
25 }

输出结果为：

a.5
b.6
c.5
d.6
a % b0