Question

easy question is there an other function i can use instead of println, because i want to output a non-static variable to a file usig out.println();

This is my code:

import java.io.*;

public class main {

String outputString ="Math.sqrt(25);" ;
static String outputPath ="src/output.txt";
/**
 * @param args
 */
public static void main(String[] args) throws IOException {
    File f;
    f= new File (outputPath);
        //file creation
        if(!f.exists()){
            f.createNewFile();
            System.out.println("File has been created");
        }else{
            f.delete();
            System.out.println("1. File has been deleted");
            f.createNewFile();
            System.out.println("2. File has been created");
        }
        //adding string(text) to file
        try{
            FileWriter outFile = new FileWriter(args[0]);
            PrintWriter out = new PrintWriter(outFile);

            out.println(outputString);
            out.close();

        }catch(IOException e){
                 e.printStackTrace();
            }
    }

}

if that is not posible maybe there is an whole other way to go around it. my main problem is that i want to make a string in to peace of code. But that seem to be hard to do 🙂 any help on that 🙂

Answer 1

The problem has nothing to do with println(). It has to do with the fact that, being non-static, outputString is associated with an instance of your class, and your code creates no such instance.

Either make outputString static, or create an instance of main:

public void doit(String[] args) throws IOException {
    ...
    PrintWriter out = ...;
    out.println(outputString);
    ...
}

public static void main(String[] args) throws IOException {
    new main().doit(args);
}