查找一個單詞並返回該單詞的特定值

Question

我有一個包含以下內容的文件：

1.10.100.1        1000.0
1.10.100.2        2000.0
1.10.100.3        2000.0
1.10.500.4        1000.0

我寫了 function 在文件中找到特定字符串：

public double searchInBalance(String depositNumber) {
    try {
        String[] words = null;
        FileReader fileReader = new FileReader(file);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        String string;
        String inputBalanceToFind = depositNumber;
        while ((string = bufferedReader.readLine()) != null) {
            words = string.split("        ");
            for (String word : words) {
                if (word.equals(inputBalanceToFind)) {
                    System.out.println("string :" + string);
                }
            }
        }
        fileReader.close();
    } catch (Exception e) {
        e.printStackTrace();
        System.out.println("Error in searchInBalance");
    }
    return 1;
}

我想做一個 function ，當找到文件的左值時返回右值（雙值），但不知道該怎么做，請幫幫我

Answer 1

  public double searchInBalance(String depositNumber){

        try {
            String[] words = null;
            FileReader fileReader = new FileReader(file);
            BufferedReader bufferedReader = new BufferedReader(fileReader);
            String string;
            String inputBalanceToFind = depositNumber;
            while ((string = bufferedReader.readLine()) != null) {
                words = string.split("        ");

                for (int i = 1; i < words.length; i += 2) {
                    if (words[i].equals(inputBalanceToFind)) {
                       System.out.println(words[i]+" - "+words[i - 1]);
                    }
                }

            }
            fileReader.close();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("Error in searchInBalance");
        }
    }

只需創建一個帶有計數器的 for 循環來處理數組的索引。 但這不是一種好的編程風格，您應該嘗試改進您的解決方案：D