Question

What I’m trying to do is have a global variable classes and function can read/write from/to.

What I have now is

import java.lang.*;             
import lab1.Global;
public class SecondProgram {
     public static void main ( String args[] ) {
            System.out.println("hi ");
            Global.b[0] = " zero ";
            Global.b[1] = " One ";
            Global.b[2] = " Two ";
            Global.b[3] = " Three ";

        }
}

and I created a class to store the global variables

public class Global {
  public static String a = "hi" ;
  public static String [] b;
}

Of course it is important that the size of the array isn’t a hardcoded constant but a variable I’ll be able to find out at some point and plug in.

I hope you can see from the code what I’m trying to do, and you know how to make it work.

Thanks!

Answer 1

i think this is a far better approach and something to get you started….

import java.util.ArrayList;

public class SecondProgram {

    private static ArrayList <String>file = new ArrayList();

    public synchronized boolean  writeFile(String str){
        //wrtite file to your list
        file.add(str);
        return true;
    }
    public static void main(String args[]) {
        //read file and use the synchronized method to write it to your list
    } 
}