Merge pull request careermonk#2 from ayusmand/master

Fixed recursive call to toString() method in BinaryTreenode class.

Author: careermonk

src/chapter06trees/BinaryTreeNode.java

@@ -71,11 +71,11 @@ public static boolean findInBT(BinaryTreeNode root, int  data) {
 	// Returns a String representation of this BinaryTreeNode.
 	public String toString() {
 		if (isLeaf()) {
-			return this.toString();
+			return this.toString1();
 		}
 		else {
 			    String root, left = "null", right = "null";
-			    root = this.toString();
+			    root = this.toString1();
 			    if (getLeft() != null) {
 					left = getLeft().toString();
 			    }

src/chapter06trees/PreOrderRecursive.java

@@ -15,8 +15,8 @@
 public class PreOrderRecursive {
 	public void PreOrder(BinaryTreeNode root){
 		if(root != null) {
+			System.out.println(root.data);		
 			PreOrder(root.getLeft());
-			System.out.println(root.data);
 			PreOrder(root.right);
 		}
 	}