運行時錯誤。請給我認識什麼我做錯了

Question

運行時的錯誤，我得到的是：

----jGRASP exec: javac -g Programmmm1.java 

Programmmm1.java:95: error: cannot find symbol 
     StringTokenizer token = new StringTokenizer(infile.nextLine()); 
    ^
    symbol: class StringTokenizer 
    location: class Programmmm1 
Programmmm1.java:95: error: cannot find symbol 
     StringTokenizer token = new StringTokenizer(infile.nextLine()); 

，這是我的實際段，爲什麼它說，它無法找到象徵？它與我的Main有什麼關係？

public static void Display()throws IOException, FileNotFoundException 
    { 
     Scanner infile = new Scanner(new FileReader("G:\\DataFile.txt")); 
     StringTokenizer token = new StringTokenizer(infile.nextLine()); 
     StringElement str = new StringElement(); 

     while(token.hasMoreTokens()) 
     { 
     str.setString(token.nextToken()); 
     stringList.insert(str); 
     } 
     stringList.print(); 
    } 

Answer 1

你需要在你的import語句

import java.util.StringTokenizer; 

更新

public static void Display()throws IOException, FileNotFoundException 
{ 
    Scanner infile = new Scanner(new FileReader("G:\\DataFile.txt")); 
    StringTokenizer token = null; 
    String line=null; 
    while((line=infile.nextLine())!=null && !"".equals(line.trim())) 
    { 
     token = new StringTokenizer(line); 
     StringElement str = new StringElement(); 

     while(token.hasMoreTokens()) 
     { 
      str.setString(token.nextToken()); 
      stringList.insert(str); 
     } 
    } 
    stringList.print(); 
}