java - 如何添加到链接列表中的特定号码？

Question

正在编写这个带有链表的 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。在打印过程中，我希望每次都将 1 添加到 Infor 中，因为我将使用 for 循环打印详细信息 10 次。

这部分发生错误:

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

下面是我的代码。

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 添加两个 int 并对结果不执行任何操作。为了修改 PlsWork 实例的 Infor 实例变量，您必须调用另一个方法。

向 PlsWork 添加一个 void setInfor(int newValue) 方法并调用:

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

或者向 PlsWork 添加一个 voidincrementInfor() 方法并调用:

list.get(lastPostion).incrementInfor();

另请注意，您的 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++)