质数算法

for (int i = 2; i <= 100; i++) {  
        int m = 0;  
        for (int j = 2; j < 100; j++) {  
            if (i > j) {  
                if (i % j == 0) {  
                    m++;  
                }  
            } else {  
                break;  
            }  
        }  
        if (m < 1) {  
            System.out.println(i);  
        }  
    }