求100以内质数或者更多

方法①

public class JavaTest {
    public static void main(String[] args) {
        Label1: for (int i = 2;i < 100;i++){
            for (int j = 2;j < i;j++){
                if (i % j == 0){
                    continue Label1;
                }
            };
            System.out.println(i);
        }
    }
}

方法②

public class JavaTest {
    public static void main(String[] args) {
        boolean judge = false;
        for (int i = 2;i < 100;i++){
            for (int j = 2;j < Math.sqrt(i);j++){
                if (i % j == 0){
                    judge = false;
                    break;
                }else {
                    judge = true;
                }
            };
            if (judge){
                System.out.println(i);
            }
        }
    }
}

只需更改100就能改变更多数的输出。