java的引用传递

public class  T{

	static class Node{
		int value;
		Node left = null;
		Node right = null;
		public Node(int value){
			this.value = value;
		}
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Node node = new Node(0);
		T bt = new T();
		bt.test(node);
		System.out.println(node.value);
		
		
	}
	
	public void test(Node node){
		node.value = 3;
		node = new Node(5);
	}
	
}

输出结果3

传递到函数里面的node相当一个新的指向原node的引用，改变这个引用的指向不会影响原Node