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 ITree
package utility.structure.def;
/**
*
* @author odie.tang
*
* @version 1.0 10/30/09
*/
public interface ITree<E>{

E getData();

E remove();

void setData(E e);

int getDepth();

int getLevel();

ITree<E> getRoot();

ITree<E> getParent();

ITree<E> getFirstChild();

ITree<E> addFirtChild(E e);

ITree<E> getLastChild();

ITree<E> addLastChild(E e);

ITree<E> getNode(E e);

boolean isLeaf();

boolean isRoot();

boolean remove(E e);
}

IBinaryTree
package utility.structure.def;
public interface IBinaryTree<E> extends ITree<E>{

boolean hasLeftChild();

boolean isLeftChild();

IBinaryTree<E> getLeftChild();

IBinaryTree<E> addLeftChild(E e);

boolean hasRightChild();

boolean isRightChild();

IBinaryTree<E> getRightChild();

IBinaryTree<E> addRightChild(E e);
}
BinaryTree
package utility.structure;
import java.io.Serializable;
import java.util.ConcurrentModificationException;
import utility.structure.def.IBinaryTree;
import utility.structure.def.ITree;
/**
*
* @author odie.tang
*
* @since 1.0 11/01/09
*/
public class BinaryTree<E> implements IBinaryTree<E>,Serializable{

private static final long serialVersionUID = 1565285530988892541L;
private E data;
private BinaryTree<E> parent = null;
private BinaryTree<E> leftChild = null;
private BinaryTree<E> rightChild = null;
private int level;
private enum Child{left,right}

public BinaryTree(E root) {
this.data = root;
this.level = 1;
}

public BinaryTree(E root, E leftChild){
this.data = root;
this.level = 1;
new BinaryTree<E>(this,Child.left,leftChild);
}

public BinaryTree(E root, E leftChild,E rightChild){
this.data = root;
this.level = 1;
new BinaryTree<E>(this,Child.left,leftChild);
new BinaryTre


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