- public class Day2Test {
- public static void main(String[] args) {
- //最简单的2*8运算,位运算。
- System.out.println(2<<3);
-
- //两个数不通过第三方变量换值。
- int n = 4;
- int m = 6;
- n = n^m;
- m = n^m;
- n = n^m;
- System.out.println(n+"..."+m);
- int x = 60 & 15;
- x=3;
- System.out.println(x);
- switch (x){
- //swith在判断byte short int char 时效率较高,无法判断boolean型。
- case 2:
- System.out.println("haha");
- case 12:
- System.out.println("yes");
- break;
- default:
- System.out.println("nono");
- }
- }
- }
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