循环双链表-JAVA语言实现

定义循环双链表类。

package DoubleLinkList;

public class DoubleNode {
	DoubleNode pre = this;
	DoubleNode next = this;
	int data;
	
	//创建构造函数
	public DoubleNode(int data) {
		this.data = data;
	}
	
	//增加节点
	public void insertNode(DoubleNode node) {
		DoubleNode nextNext = next;
		this.next = node;
		node.pre = this;
		node.next = nextNext;
		nextNext.pre = node;
	}
	
	//获得下一个节点
	public DoubleNode nextNode() {
		return this.next;
	}
	
	//获得上一个节点
	public DoubleNode preNode() {
		return this.pre;
	}
	
	//获取数据
	public int getData() {
		return this.data;
	}
}

测试程序，测试上面的函数。

package DoubleLinkList;

public class TestDoubleNode {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		DoubleNode n1 = new DoubleNode(1);
		DoubleNode n2 = new DoubleNode(2);
		DoubleNode n3 = new DoubleNode(3);
		DoubleNode n4 = new DoubleNode(4);
		DoubleNode n5 = new DoubleNode(5);
		
		n1.insertNode(n2);
		n2.insertNode(n3);
		n3.insertNode(n4);
		n4.insertNode(n5);
		
		System.out.println(n2.preNode().getData());
		System.out.println(n2.getData());
		System.out.println(n2.nextNode().getData());

	}

}