2021.6.25java笔记

1.Math.random()

Math.random()生成随机数区间为 [ 0.0, 1.0 ) 左闭右开

2.switch case

		int n = 2;
		switch(n){
		case 0:
			System.out.println("zero");
			break;
		case 1:
			System.out.println("one");
			break;
		case 2:
			System.out.println("two");
			break;
		default:
			System.out.println("other");  
			break;
			
		}
		//输出two