VM初始化期间发生Java错误,无法为对象堆保留足够的空间

VM初始化期间发生Java错误,无法为对象堆保留足够的空间,java,virtual-machine,large-object-heap,Java,Virtual Machine,Large Object Heap,这是我的密码: 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() { }

这是我的密码:

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<E> {
   private LinkedList<E> list = new LinkedList<E>();
   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<? extends E> 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<Customer> empList;
        empList = new GenQueue<Customer>();
        GenQueue<HourlyCustomer> hList;
        hList = new GenQueue<HourlyCustomer>(); 

        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?<1> or do you want to view all in queue?<0> or \nBack to main menu for dequeueing?<menu>: ");
                    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?<1=Yes/0=No>: \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);
    }
}
import java.util.LinkedList;
导入java.util.Scanner;
导入java.util.InputMismatchException;
导入java.util.*;
类客户{
公共字符串lastName;
公共字符串名;
公众客户(){
}
公共客户(最后一个字符串,第一个字符串){
this.lastName=last;
this.firstName=first;
}
公共字符串toString(){
返回firstName+“”+lastName;
}
}
类小时客户扩展客户{
公共双小时制;
公共小时客户(最后一个字符串,第一个字符串){
超级(最后,第一);
}
}
类队列{
私有LinkedList=新建LinkedList();
公共无效排队(E项){
列表。添加最后一个(项目);
}
公共E出列(){
返回list.poll();
}
公共项目(){
return!list.isEmpty();
}
公共布尔值为空()
{
返回列表==null;
}
公共E removeFirst(){
return list.removeFirst();
}
公共E getFirst(){
return list.getFirst();
}
公共整数大小(){
返回list.size();
}

public void addItems(GenQueue此问题是由JVM无法保留足够的内存空间引起的,这意味着您的OS没有足够的内存来启动JVM,此内存由
JAVA\u选择
vmargs参数设置

您可以尝试减少
-Xmx
-Xms
指定的内存

有关的详细信息:
Xms
Xmx