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java returning an comparable array of inorder traversal of binary tree Code Example
java returning an comparable array of inorder traversal of binary tree 
TreeNode tree  // this is your tree you want to traverse
E[] array = new E[tree.size];  // the arrays length must be equivalent to the number of Nodes in the tree
int index = 0; // when adding something to the array we need an index
inOrder(tree, array, index);  // thats the call for the method you'll create
Source: stackoverflow.com
java returning an comparable array of inorder traversal of binary tree 
public void inOrder(TreeNode node, E[] array, int index){
    if(node == null){  // recursion anchor: when the node is null an empty leaf was reached (doesn't matter if it is left or right, just end the method call
       return;
    }
    inOrder(node.getLeft(), array, index);   // first do every left child tree
    array[index++]= node.getData();          // then write the data in the array
    inOrder(node.getRight(), array, index);  // do the same with the right child
}
Source: stackoverflow.com



Java

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