java生成10位内随机数

public class Test {public static void main(String[] args) {System.out.println(generateRandom(1)); //生成1位随机数System.out.println(generateRandom(2)); //生成2位随机数System.out.println(generateRandom(3)); //生成3位随机数System.out.println(generateRandom(4)); //生成4位随机数System.out.println(generateRandom(5)); //生成5位随机数System.out.println(generateRandom(6)); //生成6位随机数System.out.println(generateRandom(7)); //生成7位随机数System.out.println(generateRandom(8)); //生成8位随机数System.out.println(generateRandom(9)); //生成9位随机数System.out.println(generateRandom(10));//生成10位随机数System.out.println(generateRandom(11));//生成11位随机数}private static String generateRandom(int digitNumber) {if (digitNumber == 0) {return "";}String randomStr = String.valueOf((long) ((Math.random() * 9.0 + 1) * (Math.pow(10, digitNumber - 1))));return randomStr;}
}

运行结果：

1
88
258
7450
11353
535570
7471218
59991806
236920083
8154690710
78219177381Process finished with exit code 0