title: Java Error occurred during initialization of VM Could not reserve enough space for object heap
body: <p>Here's my code:</p>
  
  <pre><code>import java.util.LinkedList;
  import java.util.Scanner;
  import java.util.InputMismatchException;
  import java.util.*;
  
  
  
  
  class Customer {
         public String lastName;
         public String firstName;
         public Customer() {
         }
         public Customer(String last, String first) {
            this.lastName = last;
            this.firstName = first;
         }
         public String toString() {
            return firstName + " " + lastName;
         }
      }
      class HourlyCustomer extends Customer {
         public double hourlyRate;
         public HourlyCustomer(String last, String first) {
            super(last, first);
         }
      }
  
  class GenQueue&lt;E&gt; {
     private LinkedList&lt;E&gt; list = new LinkedList&lt;E&gt;();
     public void enqueue(E item) {
        list.addLast(item);
     }
     public E dequeue() {
        return list.poll();
     }
     public boolean hasItems() {
        return !list.isEmpty();
     }
     public boolean isEmpty()
     {
        return list == null;
     }
     public E removeFirst(){
         return list.removeFirst();
     }
     public E getFirst(){
         return list.getFirst();
     }
     public int size() {
        return list.size();
     }
  
     public void addItems(GenQueue&lt;? extends E&gt; q) {
        while (q.hasItems()) list.addLast(q.dequeue());
     }
  }
  
  
  
  
  
  public class something {
  
      public static void main(String[] args){
          Scanner sc = new Scanner(System.in);
          String input1;
          String input2;
          int choice = 1000;
  
  
  
          GenQueue&lt;Customer&gt; empList;
          empList = new GenQueue&lt;Customer&gt;();
          GenQueue&lt;HourlyCustomer&gt; hList;
          hList = new GenQueue&lt;HourlyCustomer&gt;(); 
  
          do{
              System.out.println("================");
              System.out.println("Queue Operations Menu");
              System.out.println("================");
              System.out.println("1,Enquene");
              System.out.println("2,Dequeue");
              System.out.println("0, Quit\n");
              System.out.println("Enter Choice:");
              try{
  
                  choice = sc.nextInt();
  
  
  
                  switch(choice){
                  case 1:
  
                      do{
  
  
                      System.out.println("\nPlease enter last name:  ");
                      input1 = sc.next();
                      System.out.println("\nPlease enter first name:  ");
                      input2 = sc.next();
                      hList.enqueue(new HourlyCustomer(input1, input2));
                      empList.addItems(hList);
  
                      System.out.println("\n"+(input2 + " " +  input1) + " is successful queued");
  
                      System.out.println("\nDo you still want to enqueue?&lt;1&gt; or do you want to view all in queue?&lt;0&gt; or \nBack to main menu for dequeueing?&lt;menu&gt;: ");
                      choice = sc.nextInt();
  
                      }while (choice != 0);
  
  
  
                       System.out.println("\nThe customers' names are: \n");
  
                       while (empList.hasItems()) {
                       Customer emp = empList.dequeue();
                       System.out.println(emp.firstName + " " + emp.lastName + "\n" );
                       int choose=100;
                       System.out.println("\nGo back to main?&lt;1=Yes/0=No&gt;: \n");
                       choose = sc.nextInt();
  
                       if(choose == 1){
                           continue;
                       }
                       else
                       {
                           break;
                       }
  
  
                    }
                      break;
  
                  case 2:
  
  
                      if (empList.isEmpty()) {
                          System.out.println("The queue is empty!");
                      }
                      else{
                      System.out.println("\nDequeued customer: "  +empList.getFirst());
                      empList.removeFirst();
  
                      System.out.println("\nNext customer in queue: "  +empList.getFirst()+"\n");
  
                      }
                      break;
  
  
  
  
  
                  default:
                          System.out.println("Invalid choice");
                  }
  
              }
              catch(InputMismatchException e){
                  System.out.println("Please enter 1-5, 0 to quit");
                  sc.nextLine();
              }
          }while(choice != 0);
      }
  }
  </code></pre>
  
  <p>This problem occured when I added the if-else statement inside case 1, I wanted it to go back to main if the user inputs 1. How do I fix this? Is there an alternative to this if-else statement so that it would not cause the error? First day using java, newbie here, I need some help.</p>
  
  <blockquote>
    <p>Error occurred during initialization of VM Could not reserve enough
    space for object heap</p>
  </blockquote>