Question

使用链表编写此Java网络程序。该程序添加与其联系的每个节点的详细信息，然后将其打印出来。在打印期间，我希望每次都将1添加到 Infor ，因为我将使用for循环打印细节10次。

此部分发生错误：

list.get(lastPostion).getInfor()+1;

以下是我的代码。

public class Linked {

    public static void main(String[] args) {
        workPls oks = new workPls();
        try {
            DatagramSocket socket = new DatagramSocket(Integer.parseInt(args[0]));
            socket.setSoTimeout(0);
            while (true) {

                byte[] buffer = new byte[1024];
                DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
                socket.receive(packet);
                int data = 0;
                PlsWork ok = new PlsWork(packet.getAddress(), "pc1", data);

                oks.addNode(ok);
                oks.print();
            }
        } catch (Exception error) {
            error.printStackTrace();
        }

    }

}


public class PlsWork {

    private InetAddress IP;
    private String PC;
    private int Infor;

    public PlsWork(InetAddress IP, String PC, int Infor) {
        this.IP = IP;
        this.PC = PC;
        this.Infor = Infor;
    }

    public InetAddress getIP() {
        return IP;
    }

    public String getPC() {
        return PC;
    }

    @Override
    public String toString() {
        return IP + " " + PC;
    }

    public int getInfor() {
        return Infor;
    }

}
public class workPls {

    private LinkedList<PlsWork> list = new LinkedList<>();
    private InetAddress ip;
    private int lastPostion = 0;

    public void addNode(PlsWork st) {
        list.add(st);
    }

    public LinkedList getList() {
        return list;
    }

    public void print() {

        for (int i = 0; i > 10; i++) {
            System.out.println(list);
            System.out.println(list.get(lastPostion).getIP());
            list.get(lastPostion).getInfor() + 1;
            lastPostion+=1;
        }

    }

    public InetAddress getip() {
        return ip;
    }
}

Answer 1

list.get(lastPostion).getInfor() + 1添加了两个int s并且对结果不执行任何操作。要修改Infor实例的PlsWork实例变量，必须调用另一个方法。

向void setInfor(int newValue)添加PlsWork方法并致电：

PlsWork current = list.get(lastPostion);
current.setInfor(current.getInfor() + 1);

或者向void incrementInfor()添加PlsWork方法并致电：

list.get(lastPostion).incrementInfor();

另请注意，你的for循环中有一个不相关的拼写错误：

for (int i = 0; i > 10; i++)

应该是

for (int i = 0; i < 10; i++)

如何在链接列表中执行添加到特定号码？

1 个答案: