Random 随机数的类

1. nextInt()

  1.     默认在Integer.MIN_VALUE到Integer.MAX_VALUE 之间随机<br />        从整数最小值到整数最大值之间随机<br />![image.png](https://cdn.nlark.com/yuque/0/2022/png/28889470/1654368994725-c9fb072c-8811-4c91-9f69-4cd3715d7415.png#clientId=ubc5a4da2-9c37-4&crop=0&crop=0&crop=1&crop=1&from=paste&height=245&id=u20bea436&margin=%5Bobject%20Object%5D&name=image.png&originHeight=306&originWidth=502&originalType=binary&ratio=1&rotation=0&showTitle=false&size=21555&status=done&style=none&taskId=ubef8b1a7-0c82-47b6-9e24-d949ac73de7&title=&width=401.6)

2. nextInt(int max)

    从0到max随机<br />![image.png](https://cdn.nlark.com/yuque/0/2022/png/28889470/1654368968448-119fc027-8159-4cd2-bd1a-7f3d6f43b980.png#clientId=ubc5a4da2-9c37-4&crop=0&crop=0&crop=1&crop=1&from=paste&height=247&id=uc44d96da&margin=%5Bobject%20Object%5D&name=image.png&originHeight=309&originWidth=589&originalType=binary&ratio=1&rotation=0&showTitle=false&size=18465&status=done&style=none&taskId=u800fa1c6-e9e6-4cfd-9a8e-3229172265e&title=&width=471.2)

3.nextBoolean() 随机布尔值image.png4.nextDouble() 随机double小数image.png

5.生成随机byte值 放到byte数组中 nextByte()

image.png