阅读文件（使用FileReader）和分裂成两个字符串的Java

Question

import java.io.*; 


public class ReadFile { 

public static void read(File f) throws IOException { 
    //String delimiters = "."; 
    FileReader fr = new FileReader(f); 

    BufferedReader br = new BufferedReader(fr); 

    String line; 
    //int numberOfLines = 0; 
    while ((line = br.readLine()) != null) { 
     String[] tokens = line.split("\\.", 2); 
     String p1 = tokens[0]; 
     String p2 = tokens[1]; 
     System.out.println(p1); 
     System.out.println(p2); 
     //numberOfLines++; 
    } 
    //System.out.println("Numebr of lines in file: " + numberOfLines); 
    br.close(); 
    fr.close(); 

} 

public static void main(String[] args) { 
    File f = new File("F:\\Dictionary.txt"); 
    try { 
     read(f); 
    } catch (IOException ex) { 
     ex.printStackTrace(); 
    } 

} 


} 

我有一个问题，我在使用一个字典作为文本文件，我想读取（字典文件的）行，然后将它分开以便我可以将“单词”及其“含义”存储到不同的数组索引中。这String[] tokens = line.split("\\.", 2); to read and split at only the first "." (so that words proceeding after "." will be splitted!). I seem to having an error of ArrayIndexOutOfBound and I don't know why. I want字符串p1 =令牌[0];存储单词和`String p12 =令牌1;这些词的意思。我该怎么做？ ​​Link for Dictionary。

Answer 1

你的字典文件不是你的程序所期望的。

有单行的行（比如第一行包含单个字母A）。然后你有很多空行。

为了使您的处理更加健壮进行这些修改您解析循环：

while ((line = br.readLine()) != null) { 
    //skip empty lines 
    if (line.length() <= 1) { 
     continue; 
    } 
    try { 
     String[] tokens = line.split("\\.", 2); 
     String p1 = tokens[0]; 
     String p2 = tokens[1]; 
     System.out.println(p1); 
     System.out.println(p2); 
    } catch (IndexOutOfBoundsException e) { 
     //catch index out of bounds and see why 
     System.out.println("PROBLEM with line: " + line); 
    } 
}