Question

I am trying to compile a 4KB Java game called “Left 4K Dead”.. anyways, It will compile successfully with the javac G.java command, but when you go to run it using java G it spits back this error at me:

Exception in thread "main" java.lang.NoSuchMethodError: main

Anyone know how to make this work? Thanks 🙂

Beginning of code:

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.util.*;

 public class G extends Applet implements Runnable
 {
private boolean[] k = new boolean[32767];
private int m;

public void start()
{
    enableEvents(AWTEvent.KEY_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK);
    new Thread(this).start();
}

public void run()
{
    BufferedImage image = new BufferedImage(240, 240, BufferedImage.TYPE_INT_RGB);
    Graphics ogr = image.getGraphics();

Answer 1

Exception in thread “main” java.lang.NoSuchMethodError: main

This exception indicates exactly what it states, there is no main method, so the program cannot start.

The issue with the Left 4k Dead code is it is an applet. It expects to be compiled and then run from a webpage, not run from command line (i.e. you can’t run it with the command java). If you wish to run it from the command line, you should look into a standalone applet viewer.