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Thread: Passing command line args from main to another class

  1. #1
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    Default Passing command line args from main to another class

    Hello everyone.
    As the title mentions, is this possible? I have been tasked with passing command line args from main to the class drawOnGrid. I will have to pass much more but figured starting here would help later on. Could someone show me an example? I would appreciate it and here is what I have.
    import java.awt.*;
    import javax.swing.*;
     
    public class Tictactoe extends JFrame {
     
        //construct a figurePanel
        public Tictactoe() {
     
            Container RandomTicTacToePanel = getContentPane();
            RandomTicTacToePanel.setLayout(new GridLayout(3, 3));
     
     
            for (int i = 0; i < 9; i++) {
                RandomTicTacToePanel.add(new drawOnGrid());
            }
        }
     
        //Main method
        public static void main(String[] args) {
     
            Tictactoe Tframe = new Tictactoe();
            Tframe.setTitle("Tic Tac Toe Panel: Random Entries");
            Tframe.setSize(350, 350);
            Tframe.setResizable(true);
            Tframe.setLocationRelativeTo(null);
            Tframe.setVisible(true);
            Tframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        }
     
        class drawOnGrid extends JPanel {
     
            //overide the paintComponent
            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
     
                int random = (int) (Math.random() * 3);
     
                for (int i = 0; i < 3; i++) {
                    for (int j = 0; j < 3; j++) {
     
                        if (random == 0) {
                            System.out.print(" ");
                        } else if (random == 1) {
                            g.drawOval(10, 10, getWidth() - 20, getHeight() - 20);
                        } else if (random == 2) {
                            g.drawLine(10, 10, getWidth() - 10, getHeight() - 10);
                            g.drawLine(getWidth() - 10, 10, 10, getHeight() - 10);
     
                        }
                    }
     
                }
            }
        }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Passing command line args from main to another class

    The command line args are in the String array passed to the main() method: named args in your code.
    Use the normal way to pass an argument to any constructor or method: put the variable inside the ()s that follows the method's name.

    Your code is full of method calls that pass args to methods.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    csharp100 (September 4th, 2012)

  4. #3
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    Default Re: Passing command line args from main to another class

    Quote Originally Posted by Norm View Post
    The command line args are in the String array passed to the main() method: named args in your code.
    Use the normal way to pass an argument to any constructor or method: put the variable inside the ()s that follows the method's name.

    Your code is full of method calls that pass args to methods.
    Thanks Norm! Didn't really look at it that way.

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