My Code has a problem, either if my first void is static or not i get a error that i cant seem to fix.


This is the error i get if the void is static

Java Compiler By Noj
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RPGmain.java:29: non-static method mainmenu(java.lang.String) cannot be referenc
ed from a static context
                mainmenu(playername);
                ^
1 error
Press any key to continue . . .

if its not static it compiles fine, but it wont run i get this error when i attempt to run the code.

Exception in thread "main" java.lang.NoSuchMethodError: main
Press any key to continue . . .

This is my code.

import java.util.Scanner;

public class RPGmain {
	
    
    		public int hp = 30;
		public int str = 25;
		public int def = 20;
		public int intel = 20;
		public int bronzecoins = 50;
		public int silvercoins = 25;
		public int goldcoin = 1;
		public int level = 1;
		public int exp = '1';
		public int makerestart = 1;
		
		
                	
	public void Openning (String args[]) {
		
		System.out.println("Beware this game is not saveable");
		System.out.println("What is your name?");
		Scanner scan = new Scanner(System.in);
		String playername = scan.next();
		System.out.println("hello " + playername);
		System.out.println("Welcome to Text RPG");
		
		mainmenu(playername);
		
	}
	
	
	public void mainmenu (String playername) {
		
		while (makerestart <= 200000);
			{
		
		makerestart += 2;
		
		
		System.out.println("What would you like to do " + playername + "?");
		System.out.println("Type in help if your new");
		Scanner whatsnext = new Scanner(System.in);
		String nextaction = whatsnext.next();
		
		if(nextaction == "stats"); {
			System.out.println("hitpoints: " + hp);
			System.out.println("Strength: " + str);
			System.out.println("Defence: " + def);
			System.out.println("intelligeance: " + intel);
			System.out.println("Bronze: " + bronzecoins);
			System.out.println("Silver: " + silvercoins);
			System.out.println("Gold: " + goldcoin);
			System.out.println("Combat Level: " + level);
			}
		}
	}
}

only part that really matter about the error is the top area so i removed a bit from the bottom (the rest was all more if(nextaction == "text") anyway)

i was told making the first void static fixes the
Exception in thread "main" java.lang.NoSuchMethodError: main
problem, only way i had that work and the code compile is when i added in a empty void
something like

public static void empty (String args[]) {

	}

Recommended Answers

All 11 Replies

you need an actual method named main when starting the application and it does need to be static

It looks like you need to change Opening method to be main

i got it working, i made all the voids and variables static.
what does "static" do? making all the voids/variables static will effect the coding how?


and also
how would i clear text from

System.out.println

it makes text in the window (the game window so far is just the cmd dos window that batch coding uses also) i tryed System.out.println("cls") since "cls" i batch clears the text, but it didint work, obviously lol.

Here is an example for your problem followed by a link from this forum:

Static:

class Test {
public static printMyName() {
  System.out.println("My name IS  NEO");
}

public static void main(String [] args) {
   printMyName();

   //or

   Test.printMyName();

   //both will work
}
}

Non Static:

class Test {
public printMyName() {
  System.out.println("My name IS  NEO");
}

public static void main(String [] args) {
   Test test = new Test();
   test.printMyName();
}
}

http://www.daniweb.com/forums/thread143361.html

Static is meant to be thought of as that it doesn't apply to a specific instance of the object or class. As java addict's example, you can printMyName at any time without creating an instance.

Here is an example for your problem followed by a link from this forum:

Static:

class Test {
public static printMyName() {
  System.out.println("My name IS  NEO");
}

public static void main(String [] args) {
   printMyName();

   //or

   Test.printMyName();

   //both will work
}
}

Non Static:

class Test {
public printMyName() {
  System.out.println("My name IS  NEO");
}

public static void main(String [] args) {
   Test test = new Test();
   test.printMyName();
}
}

http://www.daniweb.com/forums/thread143361.html

wont let me do anything like that, first methode has to be
public static void main(String [] args);
it wont allow me to have anything but variables above it, no methods nothing.
wont even allow me to have a methode without a 'type' such as
public static unnamed();

but thats beside the point.

i got the code to work but when it gets to here

public static void main(String args[]) {
		
		System.out.println("What is your name?");
		Scanner scan = new Scanner(System.in);
		String playername = scan.next();
		System.out.println("hello " + playername);
		System.out.println("Welcome to Text RPG");
               [B] mainmenu(playername);[/B]
               
                
	}
	
	
	public static void mainmenu(String playername) {
		
		while (makere....

it doesent bring me to mainmenu(); and because it doesent do that im not sure if it even sends the value of (playername) to the methode either. should work with static just like you said too :/

Create mainmenu as a separate class NON STATIC

from main call this

Mainmenu mainmenu = new Mainmenu(playername);

mainmenu.run();


// in the mainmenu class
private String playerName;
public void mainmenu (String playername) {
this.playerName = playername;
}

public void run(){
while (makerestart <= 200000);
//... continue on with your original mainmenu code
}

wont let me do anything like that, first methode has to be
public static void main(String [] args);
it wont allow me to have anything but variables above it, no methods nothing.
wont even allow me to have a methode without a 'type' such as
public static unnamed();

/

That is because i wrote this:

public printMyName() {

}

When I should have written this:

public void printMyName() {

}

It was a simple mistake and you should have been able to correct it and not say that it cannot be done


Add a System.out.println("") at the begining of the mainmenu() method and see if it is called:

public static void mainmenu(String playername) {
   Sytem.out.println("mainmenu method called with: "+playername);
}

Does the playername printed? :

System.out.println("hello " + playername)

Here is an example for your problem followed by a link from this forum:

Static:

class Test {
public static printMyName() {
  System.out.println("My name IS  NEO");
}

public static void main(String [] args) {
   printMyName();

   //or

   Test.printMyName();

   //both will work
}
}

Non Static:

class Test {
public printMyName() {
  System.out.println("My name IS  NEO");
}

public static void main(String [] args) {
   Test test = new Test();
   test.printMyName();
}
}

http://www.daniweb.com/forums/thread143361.html

That is because i wrote this:

public printMyName() {

}

When I should have written this:

public void printMyName() {

}

It was a simple mistake and you should have been able to correct it and not say that it cannot be done


Add a System.out.println("") at the begining of the mainmenu() method and see if it is called:

public static void mainmenu(String playername) {
   Sytem.out.println("mainmenu method called with: "+playername);
}

Does the playername printed? :

System.out.println("hello " + playername)

ya the problem is with the variable 'makerestart' most likely, thanks for the help all problems are fixed for know, im new to java, just a couple days in, just catching in quick because i know a few other programming languages.


Does the playername printed? :

System.out.println("hello " + playername)

yes

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