最佳答案

/*节点类*/
publicclassNode{

privateNodeleft;
privateNoderight;

publicNodegetLeft(){
returnleft;
}

publicNodegetRight(){
returnright;
}

publicvoidsetLeft(Nodeleft){
this.left=left;
}

publicvoidsetRight(Noderight){
this.right=right;
}
}

/*二叉树类*/
publicclassBTree{
privateNoderoot;

publicNodegetRoot(){
returnroot;
}

publicvoidsetRoot(Noderoot){
this.root=root;
}
}