Eclipse programban mit tegyek ha ezt irja ki Could not find or load main class Start?

Van main class ez a "Start" es ezt irja benne : "import java.io.File;

import java.lang.reflect.Field;

import java.util.Arrays;

import net.minecraft.client.main.Main;

public class Start

{

public static void main(String[] args)

{

Main.main(concat(new String[] {"--version", "mcp", "--accessToken", "0", "--assetsDir", "assets", "--assetIndex", "1.8", "--userProperties", "{}"}, args));

}

public static <T> T[] concat(T[] first, T[] second)

{

T[] result = Arrays.copyOf(first, first.length + second.length);

System.arraycopy(second, 0, result, first.length, second.length);

return result;

}

}

"