Client中的while循环有什么问题？

Question

I've got problem with loop. In my project I'm sending a comments from match through socket. I know that something is wrong with one of my loops because in client last comment is still printed.

        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

        while(true){
        out.println(rel.getCommentary());

        }

getCommentary is a method with present comment from JTextField

Client's loop

        in = new Scanner(socket.getInputStream());          
        while(in.hasNextLine()){
            showCommentary(in.nextLine());
        }

Server GUI

public void actionPerformed(ActionEvent e) {

        Object source = e.getSource();

        if(source == addComment){

            String comment=commentField.getText();
            rel.setCommentaryText(comment);  
            panel4.setBackground(Color.green);

        }

Client

private void showCommentary(String text){
    showArea.append(text+ "\n");
    showArea.setCaretPosition(showArea.getDocument().getLength());
}

Relation class

public class Relation{

    String relation;

    public Relation() {

    }

     public void setCommentaryText(String relation){
         this.relation= relation;
     }

    public String getCommentary(){
        return this.relation;
    }

}

Answer 1

Well, in Server , you should have a method that will print commentary:

public void printCommentary(String commentary) {
    out.println(commentary);
}

In ServerGUI , when you set the commentary:

if (source == addComment) {
    String comment= commentField.getText();
    //call the server's print method we just wrote, only once, no loop!
    server.printCommentary(comment);
}

Your bug is that the while(true) loop is executing all the time. It prints to outputstream your last commentary forever. You shouldn't do that.