(Solved) : One Need Help Got Exception Thread Main Javalangnullpointerexception Redblacktree2leftrota Q33115129 . . . .

any one i need help i got

Exception in thread “main”java.lang.NullPointerException

at RedBlackTree2.LEFT_ROTATE(RedBlackTree2.java:150)

at RedBlackTree2.RB_INSERT_FIXUP(RedBlackTree2.java:114)

at RedBlackTree2.RB_INSERT2(RedBlackTree2.java:71)

at RedBlackTree2.RB_INSERT(RedBlackTree2.java:47)

at RedBlackTree2.main(RedBlackTree2.java:377)

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Scanner;

class RedBlackTree2 {

   class RBNode {

  public RBNode p;

          public int Key;

          public RBNode Left;

          public int color;

          public RBNode right;

  public RBNode(intcolor, RBNode leftChild, RBNode rightChild, RBNode parent,int value) {

         this.color = color;

         this.Left = leftChild;

         this.right = rightChild;

         this.p = parent;

         this.Key = value;

       }

}

  public staticRBNode root;

   public staticRBNode nil;

   static finalint RED = 0;

   static finalint BLACK = 1;  

  public RedBlackTree2() {

       nil =new RBNode(BLACK,null, null,null,