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thank you for all

i type
and paste the code and type ,formate the size
this is not the first time i post code in forums!!

--- Update ---

thank you..for your patiance..you see the captures?

--- Update ---

it is formatted!!

--- Update ---

ok thank you..i think you are annoying from me

look!! this is the capture of the code

19321933

can you copy it and paste in your IDE??

import java.util.Random;

public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

}

can i make it as attachment file

i changed all the font and formatting in my IDE

import java.util.Random;

public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

}

import java.util.Random;



public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

what can i do??

import java.util.Random;

public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

}

import java.util.Random;

public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

}

import java.util.Random;

public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

}

import java.util.Random;

public class DLinkedList {

private class Node {
int item;
Node next;
Node previous;

}

java.lang.NullPointerException
at DLinkedList.insertAfter(DLinkedList.java:37)
at DLinkedList.main(DLinkedList.java:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at...

when i try to use the insertafter function

i tried for the first question
but i have errors
can you help me please??

import java.util.Random;

public class DLinkedList {

private class Node {
int item;

implement doubly linked list and include a method to insert new node in the middle of the list
implement singly linked list and include a method to check whether two single linked lists have the...