java random类
2020-12-13 05:49
标签：范围 int() dom system code out 区间 浮点 ble java random类 标签：范围 int() dom system code out 区间 浮点 ble 原文地址：https://blog.51cto.com/14437184/2417914 Random rand=new Random();
System.out.println(rand.nextDouble()); //生成0到1区间的随机double类型的数
System.out.println(rand.nextInt()); //生成int范围内的随机数
System.out.println(rand.nextFloat()); //生成0到1区间内的随机float类型的数
System.out.println(rand.nextBoolean()); //生成随机布尔值
System.out.println(rand.nextInt(10)); //生成0到10的随机int类型的数
System.out.println(20+rand.nextInt(10)); //生成0到30的随机int类型的数
System.out.println(20+(int)(rand.nextFloat()*10)); //与上面相同
System.out.println(20+(int)(rand.nextDouble()*10)); //与上面相同
涉及浮点类型的，范围都在0到1