public static int sum() {
       return score1 + score2;  
            }
public static void main(String[] args) {
        // 调用静态方法sum并接收返回值
int allScore = HelloWorld.sum();
       int allScore1 = sum();
       
System.out.println("总分：" + allScore);
       System.out.println("总分 :  " + allScore1);
}