Anonymous

package bintree;public class BinTree<T> {	protected BinTree left;	protected BinTree right;	protected T data;		public BinTree(T data, BinTree left, BinTree right)	{		this.left = left;		this.right = right;		this.data = data;	}		public BinTree(T data)	{		this(data, null, null);	}		public boolean isLeaf()	{		return (this.left == null && this.right == null);	}		public int size()	{		if (!this.isLeaf()) {			return 1 + this.left.size() + this.right.size();		} else {			return 1;		}	}	public T getData() {		return data;	}	public void setData(T data) {		this.data = data;	}	public BinTree getLeftChild() {		return left;	}	public void setLeftChild(BinTree left) {		this.left = left;	}	public BinTree getRightChild() {		return right;	}	public void setRightChild(BinTree right) {		this.right = right;	}		public static void main(String[] args)	{		BinTree blatt1 = new BinTree<String>("Blatt1");		BinTree blatt2 = new BinTree<String>("Blatt2");		BinTree blatt3 = new BinTree<String>("Blatt3");		BinTree blatt4 = new BinTree<String>("Blatt4");		BinTree blatt5 = new BinTree<String>("Blatt5");		BinTree blatt6 = new BinTree<String>("Blatt6");				BinTree node1 = new BinTree<String>("Node1", blatt1, blatt2);		BinTree node2 = new BinTree<String>("Node2", blatt3, blatt4);		BinTree node3 = new BinTree<String>("Node3", blatt5, blatt6);				BinTree node4 = new BinTree<String>("Node4", node1, node2);		BinTree root = new BinTree<String>("Root", node4, node3);				System.out.println(root.size());	}}