NoClassDefFoundError 메인 클래스가 누락되었습니다.

Question

자바 클래스 할당 작업 중입니다. 이 프로그램은 낙서 게임을 돕기로되어 있습니다. 모든 공식 스크래블 단어를 포함하는 소스 파일 Dictionary.txt을 사용하고 사용자의 입력을 기반으로 출력 파일 output.txt을 생성합니다. 테스터를 실행하려고하면 NoClassDefFoundError이 표시됩니다. 왜 누군가가 나를 알아 내도록 도울 수 있습니까?

단어 목록 클래스 :

import java.io.File; 
import java.io.FileNotFoundException; 
import java.util.ArrayList; 
import java.util.Scanner; 

public class WordLists 
{ 



ArrayList<String> output; 
File inFile; 
String word; 
Scanner input; 

public WordLists(String fileName) throws FileNotFoundException 
{ 
    inFile = new File(fileName);  
    input = new Scanner(inFile); 
    output = new ArrayList<String>(); 
} 

public ArrayList<String> lengthN(int n) 
{ 
    while(input.hasNextLine()) 
    { 
     word = input.nextLine(); 
     if (word.length() == n) 
     { 
      output.add(word); 
      word = input.nextLine(); 
     } 

    } 
    return output; 
} 

public ArrayList<String> startsWith(int n, char firstLetter) 
{ 
    while(input.hasNextLine()) 
    {  
     word = input.nextLine(); 
     if ((word.length() == n) && (word.charAt(0) == firstLetter)) 
     { 
      output.add(word); 
      word = input.nextLine(); 
     } 

    }  
    return output; 
} 

public ArrayList<String> containsLetter(int n, char included) 
{ 
    while(input.hasNextLine()) 
    { 
     word = input.nextLine(); 
     if ((word.length() == n) && (word.contains(String.valueOf(included)))) 
     { 
      output.add(word); 
      word = input.nextLine(); 
     }  
    }  
    return output;  
} 

public ArrayList<String> vowelHeavy(int n, int m) 
{ 
    int vowels = 0; 
    while(input.hasNextLine()) 
    {  
     word = input.nextLine(); 
     if (word.length() == n) 
     { 
      for(int i = 0; i < word.length(); i++) 
      { 
       if(isVowel(word.charAt(i)) == true) 
       { 
        vowels++; 
       } 
      } 
      if (vowels == m) 
      { 
       output.add(word); 
      } 
     } 
     word = input.nextLine(); 
    } 
    return output; 
} 

public ArrayList<String> multiLetter(int m, char included) 
{ 
    while(input.hasNextLine()) 
    { 
     word = input.nextLine(); 
     if (word.contains(String.valueOf(included))) 
     { 
      int occurences = 0; 
      for(int i = 0; i < word.length(); i++) 
      { 
       if(word.charAt(i) == included) 
       { 
        occurences++; 
       } 
      } 
      if (occurences == m) 
      { 
       output.add(word); 
      }  
     } 
     word = input.nextLine(); 
    } 
    return output; 
} 

public boolean isVowel(char c) 
{ 
    if(c=='a' || c=='A' || c=='e' || c=='E' || c=='i' || c=='I' || c=='o' || c=='O')  
    {  
     return true; 
    }  
    else 
    { 
     return false; 
    }  
} 
} 

테스터 등급 : 여기

import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.PrintWriter; 
import java.util.Arrays; 
import java.util.Scanner; 

public class Tester 
{ 
public static void main(String[] args)throws FileNotFoundException 
{ 
    WordLists wl; 
    Scanner in; 
    int n; 
    int m; 
    char firstLetter; 
    char included; 

    try 
    { 
     wl = new WordLists("dictionary.txt"); 
    } 
    catch (FileNotFoundException e) 
    { 
     System.out.println("file not found"); 
     return; 
    } 


    in = new Scanner(System.in); 
    String outFile = "output.txt"; 
    PrintWriter writer = new PrintWriter(outFile); 


    System.out.println("Search by length? Enter yes or no"); 
    String response = in.next(); 
    if(response.equals("yes")) 
    { 
     System.out.println("Enter word length"); 
     n = in.nextInt(); 
     wl.lengthN(n); 
     for(String a : wl.output) 
     { 
      writer.println(a); 
     } 
     writer.close(); 
    } 
    else 
    { 
     System.out.println("Search by length and first letter?"); 
     response = in.next(); 
    }  
    if(response.equals("yes")) 
    { 
     System.out.println("Enter word length"); 
     n = in.nextInt(); 
     System.out.println("Enter the first letter"); 
     firstLetter = in.nextLine().charAt(0); 
     wl.startsWith(n, firstLetter); 
     for(String a : wl.output) 
     { 
      writer.println(a); 
     } 
     writer.close(); 
    } 
    else 
    { 
     System.out.println("Search by length and letter?"); 
     response = in.next(); 
    } 
    if (response.equals("yes")) 
    { 
     System.out.println("Enter word length"); 
     n = in.nextInt(); 
     System.out.println("Enter the letter"); 
     included = in.nextLine().charAt(0); 
     wl.containsLetter(n, included); 
     for(String a : wl.output) 
     { 
      writer.println(a); 
     } 
     writer.close(); 
    } 
    else 
    { 
     System.out.println("Search by number of vowels?"); 
     response = in.next(); 
    } 
    if(response.equals("yes")) 
    { 
     System.out.println("Enter word length"); 
     n = in.nextInt(); 
     System.out.println("Enter the number of vowels"); 
     m = in.nextInt(); 
     wl.vowelHeavy(n, m); 
     for(String a : wl.output) 
     { 
      writer.println(a); 
     } 
     writer.close(); 
    } 
    else 
    { 
     System.out.println("Search by number of occurences of a letter?"); 
     response = in.next(); 
    } 
    if(response.equals("yes")) 
    { 
     System.out.println("Enter the number of occurences"); 
     m = in.nextInt(); 
     System.out.println("Enter the letter"); 
     included = in.nextLine().charAt(0); 
     wl.multiLetter(m, included); 
     for(String a : wl.output) 
     { 
      writer.println(a); 
     } 
     writer.close(); 
    } 
} 
}  

입니다 오류가 나는 얻을 :

Exception in thread "main" java.lang.NoClassDefFoundError: Tester/java 
Caused by: java.lang.ClassNotFoundException: Tester.java 
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
Could not find the main class: Tester.java. Program will exit. 

Answer 1

그것은 당신이 코드를 컴파일하는 것을 잊었다처럼 보이는, 또는 경우 IDE를 사용하여대신 Tester.java이라는 클래스를 실행하도록 구성했을 수 있습니다..

javac WordLists.java Tester.java 
java -cp . Tester