public class mytest {
    private void myprint(int i) {
        System.out.println(i);
    }

    public void test() {
        int m = 100;
        for (int i = 2; i < Math.sqrt(m); i++) {
            for (int j = 2 * i; j < m; j += i) {
                myprint(j);
            }
        }
    }
}

上面的代码哪里可以优化呢