Errors in data structures related to stack.

Question

1.00/5 (1 vote)

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Can anybody tell me what error I have here. Bluej is showing compilation error.

What I have tried:

Java

import java.util.*;
class Queue
{
    public static void main(String[] args)
    {
        Queue a=new LinkedList();
        a.add(8);
        a.add(8);
        a.add(9);

        System.out.println(a);
        System.out.println(a.remove());
    }
}

Posted 21-Sep-20 0:05am

Member 14829312

Updated 21-Sep-20 0:30am

CPallini

v2

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2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2020-09-21T00:30:00

Solution 2

If your Queue class needs, internally a linked list, then you might write something like

Java

import java.util.*;
class Queue
{
  LinkedList<Integer> m_llist;

  public Queue()
  {
    m_llist = new LinkedList<>();
  }

  public void add(int i)
  {
    m_llist.add(i);
  }

  public static void main(String[] args)
  {
    Queue q = new Queue();
    q.add(8);
    q.add(8);
    q.add(9);
  }
}

Posted 21-Sep-20 0:30am

CPallini

Comments

Member 14829312 21-Sep-20 6:15am

I don't want linkedlist. I want only queue. My bluej is showing errors in add and remove.

import java.util.*;
class Queue
{
public static void main(String[] args)
{
Queue a=new Queue();
a.add(8);
a.add(8);
a.add(9);

System.out.println(a);
System.out.println(a.remove());
}
}

Help me. Correct it and resend me.

CPallini 21-Sep-20 6:19am

You have to implement both the Queue constructor and the add method (moreover you have to store, in the container you like, the Integers received by the add method).

Member 14829312 21-Sep-20 6:23am

Show me edited source code.

Richard MacCutchan 21-Sep-20 9:44am

+5 for a detailed implementation.

Richard MacCutchan · Answer 2 · 2020-09-21T00:16:00

Solution 1

Java

Queue a=new LinkedList();

You cannot assign a LinkedList to an object of type Queue. There is no relationship between them.

Posted 21-Sep-20 0:16am

Richard MacCutchan

Comments

CPallini 21-Sep-20 5:28am

5.

Errors in data structures related to stack.

2 solutions

Solution 2

Solution 1

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Errors in data structures related to stack.

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Solution 1

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