java - 我的代码和/或逻辑有什么问题？

Question

我在执行 APCS 分配时遇到一些问题。该程序应该从文本文件 test1.txt 中读取长度为 2 的字符串，并打印出以下内容的百分比:a) 女孩-女孩、男孩-男孩、男孩-女孩或女孩-男孩组合，以及 b)各个组的总数。

我已经尝试了一个小时来解决这个问题!尽管我对第 25 行中的 String 声明表示怀疑，但我没有办法确认这一点。此外，我担心我弄乱了 if-else-if-else 循环而没有提示编译器错误。

附上源码供大家引用。如果您需要任何其他信息，请随时询问。

由于我是新用户，声誉 < 10，请参阅附图:

详细说明什么不起作用。我截图并写了相关评论!

/**
 * Family takes user input of sets of boys, girls, and boys + girls. Results are then
 * tabulated and displayed in a percentage form to the user. The total number of 
 * individuals are also displayed.
 * 
 * @E. Chu
 * @Alpha
 */

import java.util.Scanner;
import java.io.File;
import java.io.IOException;

public class Family {

   public static void main (String[] args) throws IOException {

   int boyCount = 0;
   int girlCount = 0;
   double boyGroupCount = 0.0;
   double girlGroupCount = 0.0;
   int mixedGroupCount = 0;
   int totalPersonCount = 0;
   double totalGroupCount;
   String currentToken = "  ";
   Scanner inFile = new Scanner (new File ("test1.txt"));

   while (inFile.hasNextLine()) {
       currentToken = inFile.nextLine( );
       if (currentToken == "BG") {
          boyCount++;
          girlCount++; 
          mixedGroupCount++; }
       else if (currentToken == "GB") {
           boyCount++;
           girlCount++;
           mixedGroupCount++; } 
       else if (currentToken == "BB") {
          boyCount += 2; 
          boyGroupCount++; }
       else {
          girlCount += 2; 
          girlGroupCount++; } 
   }

   inFile.close();
   totalPersonCount = boyCount + girlCount;
   totalGroupCount = boyGroupCount + girlGroupCount + mixedGroupCount;
   System.out.println("Sample Size: " + totalPersonCount);
   System.out.println("Two Boys (%): " + boyGroupCount / totalGroupCount + "%");
   System.out.println("One Boy, One Girl (%): " + mixedGroupCount + "%");
   System.out.println("Two Girls (%): " + girlGroupCount / totalGroupCount + "%");

} // End of main method.

} // End of class Family.

Answer 1

currentToken == "BB" 应该是 currentToken.equals("BB")

不要使用==，而是使用equals方法