如何僅讀取每行上的第二個字Java

Question

直到現在，我一直在逐行讀取帶有BufferedReader的文件，但是，現在我希望能夠只存儲該行上的第二個字。我把我的行存儲在一個hashmap中，以便查找。

 int i=0; 

    HashMap<Integer, String> mapHash = new HashMap<Integer, String>(); 

    try { 
     BufferedReader in = new BufferedReader(new FileReader("file")); 
     String st; 


     while ((st = in.readLine()) != null) { 
      st = st.trim(); 
      //store the lexicon with position in the hashmap 
      mapHash.put(i, st); 
      i++; 

     } 
     in.close(); 
    } catch (IOException e) { 
    } 

任何人都可以幫我讀出每行上的第二個單詞嗎？

謝謝！

Answer 1

例如

import java.io.BufferedReader; 
import java.io.FileReader; 
import java.io.IOException; 
import java.util.HashMap; 
import java.util.Map; 
import java.util.StringTokenizer; 

//... 
try (BufferedReader in = new BufferedReader(new FileReader("file"));) { 
     Map<Integer, String> mapHash = new HashMap<>(); 
     int i = 0; 
     String st; 

     while ((st = in.readLine()) != null) { 
      st = st.trim(); 
      StringTokenizer tokenizer = new StringTokenizer(st); 
      int j = 0; 
      while (tokenizer.hasMoreTokens()) { 
       if (j == 1) { 
        mapHash.put(i, tokenizer.nextToken()); 
        break; 
       } else { 
        tokenizer.nextToken(); 
        j++; 
       } 
      } 
      //store the lexicon with position in the hashmap 
      i++; 
     } 
    } catch (IOException e) { 
     throw new RuntimeException(e); 
    }