random.nextint() detailed explanation

Usage of random.nextInt()

1. nextInt() without parameters will generate all valid integers (including positive numbers) , negative number, 0)

2. NextInt(int x) with parameters will generate an arbitrary positive integer in the range of 0~x (excluding X)

For example: int x =new Random.nextInt(100);

Then x is an arbitrary integer from 0 to 99

3. Generate an integer within the specified range

  /*
     * 生成[min, max]之间的随机整数
     * @param min 最小整数
     * @param max 最大整数
     */
    private static int randomInt(int min, int max){
        return new Random().nextInt(max)%(max-min+1) + min;
    }

For example: call The method randomInt(10,20); will generate an arbitrary integer within the [10,20] set

Recommended tutorial: "java tutorial"

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