javaswingjframejbuttonjtextarea

Console output to Frame, text area?

I am learning java, I have created a dice thrower - when i press the button it throws a dice - but the output is in the console. How can I output in the same frame with the buttons.

// sorry i am not native english speaking person, but i hope you get the idea.

import javax.swing.*;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.JTextArea;

public class Main {

public static void main(String s[]){
    Random  rand = new Random();

    JFrame frame = new JFrame("Dice Thrower 2000");
    JPanel panel=new JPanel();
    panel.setLayout(new FlowLayout());
    JLabel label = new JLabel("Throw dice");
    JLabel label1 = new JLabel("You got : ");
    JTextArea output = new JTextArea(" a ");

    JButton buttond4  = new JButton();
    buttond4.setText("d4");
    buttond4.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent actionEvent) {
            int n = rand.nextInt(4) + 1;
            System.out.println("You threw d4 and got " + n);

        }
    });


    JButton buttond6 = new JButton();
    buttond6.setText("d6");
    buttond6.addActionListener(new ActionListener() {...});

    JButton buttond8 = new JButton();
    buttond8.setText("d8");
    buttond8.addActionListener(new ActionListener() {...});

    JButton buttond10 = new JButton();
    buttond10.setText("d10");
    buttond10.addActionListener(new ActionListener() {...});


    JButton buttond12 = new JButton();
    buttond12.setText("d12");
    buttond12.addActionListener(new ActionListener() {...});

    JButton buttond20 = new JButton();
    buttond20.setText("d20");
    buttond20.addActionListener(new ActionListener() {...});

    panel.add(label);
    panel.add(buttond4);

    panel.add(buttond6);
    panel.add(buttond8);
    panel.add(buttond10);
    panel.add(buttond12);
    panel.add(buttond20);
    panel.add(label1);



    frame.add(output);
    frame.add(panel);
    frame.setSize(500, 200);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
}

}

I have provided buttons d4 - extended code, the code for rest buttons is almost identical.

Solution

  • Using System.out.println("You threw d4 and got " + n); causes the print to the console.

    You should use the JTextArea#append method instead. Your code would become:

    final JTextArea output = new JTextArea(" a ");

JButton buttond4  = new JButton();
buttond4.setText("d4");
buttond4.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        int n = rand.nextInt(4) + 1;
        output.append("You threw d4 and got " + n + "\n");

    }
});

    Edit:

    You also need to add the output to the JFrame. You tried this by using

    frame.add(output);
frame.add(panel);

    but that won't work. The content pane of a JFrame by default has a BorderLayout, and calling add will add the component in the BorderLayout#CENTER. That area can only contain one component.

    Now you have two options: