java编程思想 第四章 练习4

写一个程序，使用两个嵌套的for循环和取余操作符（%）来探测和打印素数（只能被其自身和1整除，而不能被其他数字整除的整数）

/**
* ****************** Exercise 4 ******************
* Write a program to detect and print prime numbers
* (integers evenly divisible only by themselves
* and 1), using two nested for loops and the
* modulus operator (%).
************************************************
* Created by yule on 2017/10/30 22:16.
*/

private static void findPrimes(int max) {
boolean primes;
for(int i = 1; i <= max; i++){
primes = true;
//排除自身和1
for(int j = 2; j < i; j++){
if(i % j == 0){
primes = false;
}
}
if(primes){
System.out.print(i + "  ");
}
}
}