Java Handler is abstract; Cannot be instatiated

Question

I am trying to set up a Server for a Worms-like game made in Java (to allow Multiplayer and in-game chat) but I have this specific problem.

I have tried changing the import, but it didn't resolve the issue.

Screenshot here : https://i.stack.imgur.com/cAlQK.png

package Server;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.util.HashSet;

import java.util.logging.Handler;

public class Server {
    private static final int PORT = 9001;

    private static HashSet<String> names = new HashSet<String>();
    private static HashSet<PrintWriter> writers =
            new HashSet<PrintWriter>();

    public static void main(String[] args) throws Exception {
        System.out.println("The chat server is running.");
        try(ServerSocket listener = new ServerSocket(PORT)) {
            while (true) {
                new Thread(new Handler(listener.accept())).start();
            }
        }
    }
}

Please post code in the question, not as an attached screenshot. — Don Roby, May 31 '14 at 22:37
There is insufficient content to diagnose the problem, unless you provide an example of your problem, the question will be closed — MadProgrammer, May 31 '14 at 22:38
It's Works For You:- http://stackoverflow.com/questions/19873063/handler-is-abstract-cannot-be-instantiated — InsaneCat, May 20 '16 at 11:04

score 1 · Accepted Answer · answered May 31 '14 at 22:41

As the error says, an abstract class cannot be instantiated, i.e., we cannot precede it with the word new, unless you also add the class body and implement any abstract methods. Alternately, you can create a class that extends Handler, and again make sure to add all of the abstract methods.

new Handler() {

    @Override
    public void close() throws SecurityException {
        // TODO Auto-generated method stub

    }

    @Override
    public void flush() {
        // TODO Auto-generated method stub

    }

    @Override
    public void publish(LogRecord arg0) {
        // TODO Auto-generated method stub

    }

};

Thak you , is my import correct ? import java.util.logging.Handler; — Yaaya26, May 31 '14 at 23:13
No .. you have to import import android.os.Handler not java.util.logging.Handler; — Subhalaxmi, Mar 14 '15 at 12:09

Java Handler is abstract; Cannot be instatiated

1 Answers1