我對Java編程入門中的第一個Java實驗室的了解如何？我的代碼是否正確？

Question

// Create a method called displayHighScorePosition
// it should a players name as a parameter, and the 2nd parameter as a position in the high score table
// You should display the player's name along with a message like " managed to get into position " and the
// position they got and a further message " on the high score table".
//
// Create a 2nd method called calculateHighScorePosition
// it should be sent one argument only, the player score
// it should return an in
// the return data should be
// 1 if the score is >=1000
// 2 if the score is >=500 and < 1000
// 3 if the score is >=100 and < 500
// 4 in all other cases
// call both methods and display the results of the following
// a score of 1500, 900, 400 and 50

    public class Challenge {
        public static void main(String[] args) {


      int position=calculateHighScorePosition(1500);
      displayHighScorePosition("Stone",position);
      position=calculateHighScorePosition(900);
      displayHighScorePosition("shawn",position);
      position=calculateHighScorePosition(400);
      displayHighScorePosition("Simon",position);
      position=calculateHighScorePosition(50);
      displayHighScorePosition("sks",position);   }


        public static void displayHighScorePosition(String playerName, int position) {
            System.out.println(playerName + " managed to get into position");
            System.out.println(position + " on the high score table");
        }

        public static int calculateHighScorePosition(int playerScore) {
           if(playerScore>1000){
               return 1;
           }else if(playerScore>500&&playerScore<1000) {
               return 2;
           }else if(playerScore>100&&playerScore<500) {
               return 3;
           }else {
               return 4;
           }
           }

        }

Answer 1

編輯后，基本程序似乎還可以，但需注意以下幾點：

返回數據應該是
如果得分> = 1000，則為1
如果得分> = 500且<1000，則為2
如果分數> = 100且<500，則為3
其他所有情況為4

但是當前測試省略了測試的=部分。 例如，嘗試運行一個分數等於500的測試用例。結果是什么？

因此，檢查可能應該類似於以下內容，將=和來自@JohnyMopp的注釋並入並不需要&&之外的部分：

if(playerScore >= 1000){
       return 1;
} else if (playerScore >= 500) {
       return 2;
} else if (playerScore >= 100) {
       return 3;
} else {
       return 4;
}

在邊界處編寫一些測試用例是確保程序邏輯正確運行的最佳方法。 因此，除了指定的結果外，還要在1000、500、100、499、99處添加一些測試。基本上，開始考慮可能會影響結果的極端情況。

此處有一些標准輸出示例： https : //ideone.com/sGi48C