java - binary tree deletion saying null pointer -


So far, I have added nodes to my binary tree which you can choose which parents want you to The hair node is additive but the problem is Whrnever I remove a node removes it and sometimes it says zero pointer exception and when I show my nodes it still there is this my dlatitan method: 

 < Code> Public Zero deletion (node ​​node) {if (node! = Null) {if (node.value.equals (nodeToDelete)) {node = null; } Delete (node. Left); Delete (node.right); }}}   
 I already define my node, add my method, and nododillet is a string and all.tnx already exists   
 
 
  Sometimes this is called zero notifier exception . I think your  NPE  was thrown when your  node  was not worth the value.  
 You need to review your code, how did you define your  value ?  
  if (node.value.equals (nodododelite)) {

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