一、雙向鏈表定義
class HeroNode2 {
public int no;
public String name;
public String nickname;
public HeroNode2 next;
public HeroNode2 pre;
public HeroNode2(int no, String name, String nickname) {
this.no = no;
this.name = name;
this.nickname = nickname;
}
@Override
public String toString() {
return "HeroNode2{" +
"no=" + no +
", name='" + name + '\'' +
", nickname='" + nickname + '\'' +
", next=" + next +
'}';
}
}
二、添加節點
public void add(HeroNode2 heroNode) {
HeroNode2 temp = head;
while (true) {
if(temp.next == null) {
break;
}
temp = temp.next;
}
temp.next = heroNode;
heroNode.pre = temp;
}
三、按照順序顯示鏈表
public void list() {
if(head.next == null) {
System.out.println("null");
return;
}
HeroNode2 temp = head.next;
while (true) {
if(temp == null) {
break;
}
System.out.println(temp);
temp = temp.next;
}
}
四、編輯節點
public void update(HeroNode2 newHeroNode) {
if(head.next == null) {
System.out.println("LinkedList is null~~");
return;
}
HeroNode2 temp = head.next;
boolean flag = false;
while (true) {
if(temp == null) {
break;
}
if(temp.no == newHeroNode.no) {
flag = true;
break;
}
temp = temp.next;
}
if(flag) {
temp.name = newHeroNode.name;
temp.nickname = newHeroNode.nickname;
}else {
System.out.println("no find " + newHeroNode.no);
}
}
五、刪除節點
public void del(int no) {
if(head.next == null) {
System.out.println("null");
return;
}
HeroNode2 temp = head.next;
boolean flag = false;
while (true) {
if(temp == null) {
break;
}
if(temp.no == no) {
flag = true;
break;
}
temp = temp.next;
}
if(flag) {
temp.pre.next = temp.next;
if(temp.next != null){
temp.next.pre = temp.pre;
}
}else {
System.out.println("bu cun zai " + no);
}
}
六、測試
public static void main(String[] args) {
HeroNode2 heroNode1 = new HeroNode2(1,"1","1");
HeroNode2 heroNode2 = new HeroNode2(2,"2","2");
HeroNode2 heroNode3 = new HeroNode2(3,"3","3");
HeroNode2 heroNode4 = new HeroNode2(4,"4","4");
DoubleLinkedList doubleLinkedList = new DoubleLinkedList();
doubleLinkedList.add(heroNode1);
doubleLinkedList.add(heroNode2);
doubleLinkedList.add(heroNode3);
doubleLinkedList.add(heroNode4);
doubleLinkedList.list();
HeroNode2 newHeroNode2 = new HeroNode2(4,"44","44");
doubleLinkedList.update(newHeroNode2);
System.out.println();
doubleLinkedList.list();
doubleLinkedList.del(1);
System.out.println();
doubleLinkedList.list();
}