java 实现双向链表实例详解

2024-02-26 19:59:03 340

java实现双向链表实例详解

双向链表是一个基本的数据结构，在Java中LinkedList已经实现了这种结构，不过作为开发者，也要拥有自己显示这种结构的能力。话不多说，上代码：

首先是链表的节点类：

/**
*链表节点
*@authorAdministrator
*
*@param
*/
publicclassChainNode{
privateTdata;
//对象编号
privateintdataNo;

publicChainNodenextChainNode;
publicChainNodepreChainNode;
publicChainNode(Tdata,ChainNodenextChainNode,
ChainNodepreChainNode){
this.data=data;
this.nextChainNode=nextChainNode;
this.preChainNode=preChainNode;
}



publicChainNode(Tdata){
this.data=data;
}



publicintgetDataNo(){
returndataNo;
}



publicvoidsetDataNo(intdataNo){
this.dataNo=dataNo;
}


publicvoidsetData(Tdata){
this.data=data;
}



publicTgetData(){
returndata;
}


}

然后是链表：

/**
*链表实现类
*@authorAdministrator
*
*@param
*/
publicclassChain{
//头节点
privateChainNodeheadNode;
//末尾节点指针
privateChainNodelastNode;
privateintsize;


//创建链表就创建头节点
publicChain(){
this.headNode=newChainNode(null);
this.lastNode=headNode;

}
//增加一个节点
publicvoidaddNode(Tdata){
ChainNodenode=newChainNode(data);
if(lastNode!=null){
lastNode.nextChainNode=node;
node.preChainNode=node;
node.setDataNo(size);
lastNode=node;
size++;
}
}
//删除指定索引的节点
publicvoiddeleteNode(intdataNo)throwsException{
if(getSize()==0){
thrownewException("chainisempty");
}
for(ChainNodenode=headNode.nextChainNode;node!=null;node=node.nextChainNode){
if(node.getDataNo()==dataNo){
node.preChainNode.nextChainNode=node.nextChainNode;
if(node.nextChainNode!=null){
node.nextChainNode.preChainNode=node.preChainNode;
}

node.nextChainNode=null;
node.preChainNode=null;
size--;
//重新设置节点的编号
for(ChainNodechainNode=node.nextChainNode;chainNode!=null;chainNode=chainNode.nextChainNode){
chainNode.setDataNo(chainNode.getDataNo()-1);
}
return;

}
}
thrownewException("thecorrespondingdatathatcannotbefound");
}
//获取指定索引的节点
publicTget(intdataNo)throwsException{
if(getSize()==0){
thrownewException("chainisempty");
}
for(ChainNodenode=headNode.nextChainNode;node!=null;node=node.nextChainNode){
if(node.getDataNo()==dataNo){
returnnode.getData();
}
}
thrownewException("thecorrespondingdatathatcannotbefound");
}
//修改对应索引的节点
publicvoidset(intdataNo,Tdata)throwsException{
if(getSize()==0){
thrownewException("chainisempty");
}
for(ChainNodenode=headNode.nextChainNode;node!=null;node=node.nextChainNode){
if(node.getDataNo()==dataNo){
node.setData(data);
return;
}
}
thrownewException("thedatathatistobemodifiedcannotbefound");
}
//是否包含对应数据的节点
publicbooleanisContains(Tdata)throwsException{
if(getSize()==0){
thrownewException("chainisempty");
}
for(ChainNodechainNode=headNode.nextChainNode;chainNode!=null;chainNode=chainNode.nextChainNode){
if(chainNode.getData()==data){
returntrue;
}
}

returnfalse;
}
//获取节点数量（不含头节点）
publicintgetSize(){
returnsize;
}
}

测试一下：

publicclassChainTest{
publicstaticvoidmain(String[]args)throwsException{
StringoneString="one";
StringtwoString="two";
StringthreeString="three";
StringfourString="four";
Chainchain=newChain();
chain.addNode(oneString);
chain.addNode(twoString);
chain.addNode(threeString);
chain.addNode(fourString);
for(inti=0;i
结果：


one
two
three
four
thedataofthesecondnodeisthree
true
modifychain
one
haha
three
four
deleteonenode
one
haha
three


感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

java 实现双向链表实例详解

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