我应该把 console.next() 放在哪里？

Question

这段代码查看了几个文件，以查找您输入的任何名称的流行度和含义。我几乎没有开始它的图形部分，所以这就是 drawGraph 方法看起来很奇怪的原因。 我想知道如何获取它，因此用户只需输入一次名称。我知道有 String originalName = console.next();在 nameToLowerCase 的第一行是问题，我只是不知道该放在哪里。我试过把它放在介绍中，但那没有用，因为那时我必须使介绍等于名称，并且每当我想要名称时，整个介绍都会再次重复。 谢谢，这是我的代码和输出： 输出：

This program allows you to search through the
data from the Social Security Administration
to see how popular a particular name has been
since 1890

    Name: aaron
    Aaron f 0 0 0 0 0 0 0 0 0 883 0 0 0
    aaron
    aaron
    aaron
    AARON m English, Biblical From the Hebrew name ??????? ('Aharon) which is most likely of unknown Egyptian origin.
    aaron
    aaron
    aaron
    aaron
    aaron
    aaron
    aaron
    aaron
    aaron
    aaron
    aaron

（它使用户一遍又一遍地输入名称）。 代码：

import java.util.*;
import java.io.*;
import java.awt.*;

public class BabyNames{ //ADD COMMENTS
   public static final int STARTINGYEAR = 1890;
   public static final int WIDTH = 60;
   public static final int HEIGHT = 30; 
   public static void main(String[] args) throws FileNotFoundException{
      Scanner console = new Scanner(System.in);
      DrawingPanel panel = new DrawingPanel(780,560);
      Graphics g = panel.getGraphics();
      Scanner nameFile = new Scanner(new File("names.txt"));
      Scanner meaningsFile = new Scanner(new File("meanings.txt"));
      Scanner nameFile2 = new Scanner(new File("names2.txt"));
      intro();
      if(STARTINGYEAR == 1890){
      findingStatistics(console,nameFile);
      drawGraph(g);
      }
      else{
      findingStatistics(console, nameFile2);       
      drawGraph(g);
   }
   findingStatistics(console,meaningsFile);
   }



   public static void intro(){
      System.out.println("This program allows you to search through the");
      System.out.println("data from the Social Security Administration");
      System.out.println("to see how popular a particular name has been");
      System.out.println("since 1890" );
      System.out.println();
      System.out.print("Name: ");
      }

   public static String nameToLowerCase(Scanner console){   
      String originalName = console.next();
      String name = "" ;
      int lengthOfName = originalName.length();
      String beginingOfName = originalName.substring(0,1).toUpperCase();
      String endOfName = originalName.substring(1,lengthOfName).toLowerCase();
      name = beginingOfName + endOfName;
      return name;
   }
   public static String findingStatistics(Scanner console, Scanner data){
      String nameFinal = nameToLowerCase(console);
      boolean goesThroughOnce = false; //
      String statistics = "";
      String currWord = "";
      String currLine = "";
      while (data.hasNext() && goesThroughOnce == false){ 
         currLine = data.nextLine();
         Scanner lineBeingRead = new Scanner(currLine); //make other scanners?? for each file
         currWord = lineBeingRead.next(); //

         if (currWord.equals(nameFinal) || currWord.equals(nameFinal.toUpperCase())){   //         
            statistics = currLine;
            goesThroughOnce = true;
            System.out.println(statistics);
        }
        else{
        }
   }
   return statistics;
}
   public static void drawGraph(Graphics g){
   g.setColor(Color.LIGHT_GRAY);
   g.fillRect(0,0,780,30);
   g.fillRect(0,530,780,30);
  }
}

Answer 1

如果我理解正确，您希望用户只需提供一次搜索词。

一种解决方案是稍微重构。只需在类级别声明nameFinal 变量并在调用intro() 后读取该变量的输入一次。

看起来像这样：

import java.util.*;
import java.io.*;
import java.awt.*;

public class BabyNames{ //ADD COMMENTS
   public static final int STARTINGYEAR = 1890;
   public static final int WIDTH = 60;
   public static final int HEIGHT = 30; 

   // CLASS LEVEL VAR TO HOLD THE SEARCH TERM
   private static String nameFinal;

   public static void main(String[] args) throws FileNotFoundException{
      Scanner console = new Scanner(System.in);
      DrawingPanel panel = new DrawingPanel(780,560);
      Graphics g = panel.getGraphics();
      Scanner nameFile = new Scanner(new File("names.txt"));
      Scanner meaningsFile = new Scanner(new File("meanings.txt"));
      Scanner nameFile2 = new Scanner(new File("names2.txt"));
      intro();

      // READ THE SEARCH HERE ONLY ONCE
      nameFinal = nameToLowerCase(console);

      if(STARTINGYEAR == 1890){
      findingStatistics(console,nameFile);
      drawGraph(g);
      }
      else{
      findingStatistics(console, nameFile2);       
      drawGraph(g);
   }
   findingStatistics(console,meaningsFile);
   }



   public static void intro(){
      System.out.println("This program allows you to search through the");
      System.out.println("data from the Social Security Administration");
      System.out.println("to see how popular a particular name has been");
      System.out.println("since 1890" );
      System.out.println();
      System.out.print("Name: ");
      }

   public static String nameToLowerCase(Scanner console){   
      String originalName = console.next();
      String name = "" ;
      int lengthOfName = originalName.length();
      String beginingOfName = originalName.substring(0,1).toUpperCase();
      String endOfName = originalName.substring(1,lengthOfName).toLowerCase();
      name = beginingOfName + endOfName;
      return name;
   }
   public static String findingStatistics(Scanner console, Scanner data){
      // NOW THE nameFinal VAR ALREADY HAS A VALUE
      boolean goesThroughOnce = false; //
      String statistics = "";
      String currWord = "";
      String currLine = "";
      while (data.hasNext() && goesThroughOnce == false){ 
         currLine = data.nextLine();
         Scanner lineBeingRead = new Scanner(currLine); //make other scanners?? for each file
         currWord = lineBeingRead.next(); //

         if (currWord.equals(nameFinal) || currWord.equals(nameFinal.toUpperCase())){   //         
            statistics = currLine;
            goesThroughOnce = true;
            System.out.println(statistics);
        }
        else{
        }
   }
   return statistics;
}
   public static void drawGraph(Graphics g){
   g.setColor(Color.LIGHT_GRAY);
   g.fillRect(0,0,780,30);
   g.fillRect(0,530,780,30);
  }
}