NullPointer beim Versuch, auf ein Array von Objekten in einer anderen Methode zuzugreifen

Question

Ich möchte auf mein Array von Objekten von einer anderen Methode in meiner Klasse zugreifen. Mein Code ist wie folgt. Ich erhalte einen NullPointerException-Fehler.

Die nameArray liest einfach eine Textdatei, und Daten werden darin gespeichert.

public class menu { 

    static Scanner askInfo = new Scanner(System.in); 
    public static Student ArrObj[] = new Student[15]; //instantiates an array of student objects 

    public static void main(String args[]) throws IOException { 
     for (int i = 0; i < 15; i++) { 
      ArrObj[i] = new Student(); //creates an array of student objects 
      System.out.println("Here is the list of all children."); 
      System.out.println("Which child's information do you want to enter?"); 
      int InName = askInfo.nextInt(); 
      switch (InName) { 
       case 1: 
        ArrObj[i].setName(Read.nameArray[0].substring(3)); 
        break; 
       case 2: 
        ArrObj[i].setName(Read.nameArray[1].substring(3)); 
        break; 
       case 3: 
        ArrObj[i].setName(Read.nameArray[2].substring(3)); 
        break; 
       case 4: 
        ArrObj[i].setName(Read.nameArray[3].substring(3)); 
        break; 
      } 
     } 
     for (int i = 0; i < 15; i++) { 
      System.out.println(ArrObj[i].getName()); 
     } 
    } 

} 

Die (wichtige Teile) Student Klasse:

public class Student { 
    private String name;  //name of student  

    public void setName(String name) { 
      this.name = name; 
    } 

    public String getName(){ 
     return name; 
    } 
} 

Die Read-Klasse:

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

public class Read { 

    static String nameArray[] = new String[100]; //to be safe, declare plenty 

    public static void ReadNames() throws IOException //method to read names 
    { 
     Scanner read = new Scanner(new File("C:\\IA\\names.txt")); //this will read the names of students 
     int counter = -1; //-1 so that when incremented, the first index is 0 
     while (read.hasNext()) { 
      counter++; 
      nameArray[counter] = read.nextLine(); 
     } 
    } 
} 

Answer 1

public static void main(String args[]) throws IOException { 

    Read.ReadNames(); 

    for (int i = 0; i < 3; i++) { 
     ArrObj[i] = new Student(); // creates an array of student objects 
     System.out.println("Here is the list of all children."); 
     System.out.println("Which child's information do you want to enter?"); 
     int InName = askInfo.nextInt(); 
     switch (InName) { 
     case 1: 
      ArrObj[i].setName(Read.nameArray[0]); 
      break; 
     case 2: 
      ArrObj[i].setName(Read.nameArray[1]); 
      break; 
     case 3: 
      ArrObj[i].setName(Read.nameArray[2]); 
      break; 
     case 4: 
      ArrObj[i].setName(Read.nameArray[3]); 
      break; 
     } 

    } 

    for (int i = 0; i < 3; i++) { 
     System.out.println(ArrObj[i].getName()); 
    } 

}