单链表，为什么写的运行不出来呢，

Question

为什么添加不进去呀，而且运行不出来东西，也没有报错找不出问题来，帮看一下，感谢感谢刚开始学

public class Tset4 {
public static void main(String[] args) {
HeroNode head1 = new HeroNode(1,"ww","xw");
HeroNode head2 = new HeroNode(2,"cc","xc");
HeroNode head3 = new HeroNode(3,"a","xa");
HeroNode head4 = new HeroNode(4,"vv","xv");

    SingkeLindeList s = new SingkeLindeList();

    s.add(head1);
    s.add(head2);
    s.add(head4);
    s.add(head3);
    s.list();

}

}

class SingkeLindeList {
HeroNode head = new HeroNode(0, "", "");

public void add(HeroNode heroNode) {
    HeroNode temp = head;
    while (true) {
        if (temp.next == null) {
            break;
        }
        temp = temp.next;
    }
    temp.next = heroNode;


}

public void add2(HeroNode heroNode) {
    HeroNode temp = head;
    boolean flag = false;
    while (true) {
        if (temp.next == null) {
            break;
        }
        if (temp.next.no > heroNode.no) {
            break;
        } else if (temp.next.no == heroNode.no) {
            flag = true;
            break;
        }
    }
    if (flag) {
        System.out.printf("编号存在%d", heroNode.no);
    } else {
        heroNode.next = temp.next;
        temp.next = heroNode;
    }
}

public void update(HeroNode heroNode) {
    if (heroNode.next == null) {
        System.out.println("链表为空");
    }
    HeroNode temp = heroNode;
    boolean flag = false;
    while (true) {
        if (temp == null) {
            break;
        } else if (temp.no == heroNode.no) {
            flag = true;
            break;
        }
        temp = temp.next;
    }

    if (flag) {
        temp.name = heroNode.name;
        temp.nikname = heroNode.nikname;
    } else {
        System.out.println("编号不存在" + heroNode.no);
    }
}
public void delet(int no){
    HeroNode temp = head;
    boolean flag = false;
    while(true) {
        if(temp.next == null) {
            System.out.println("链表空");
        }else if(temp.next.no == no) {
            flag = true;
            break;
        }
        temp = temp.next;
    }
    if(flag) {
        temp.next = temp.next.next;
    }else {
        System.out.println("不存在，没找到");
    }
}

public void list() {
    if(head.next == null) {
        System.out.println("链表空");
        return;
    }
    HeroNode temp = head.next;
    while(true) {
        if(temp == null) {
            break;
        }
    }
    System.out.println(temp);
    temp = temp.next;
}

}

class HeroNode {
public int no;
public String name;
public String nikname;
public HeroNode next;//指向下一个节点

public HeroNode(int no, String name, String nikname) {
    this.no = no;
    this.name = name;
    this.nikname = nikname;
}

@Override
public String toString() {
    return "HeroNode [no=" + no + ", name=" + name + ", nikname=" + nikname + "]";
}

}

Answer 1

数据结构对单链表进行数据排序