Thread: Make JTextArea act as console?

Hello everyone,
I was playing around with Java Swing since i wanted to learn more about it. I have 2 .java files as follows:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
 
 
public class Easy extends JFrame{
 
JTextArea text=new JTextArea();
JPanel panel=new JPanel(new GridLayout(2,2));
 
JButton button1 =new JButton("Start");
 
public Easy(){
 
panel.add(text);
 
panel.add(button1);
add(panel,BorderLayout.CENTER);
 
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
//add code to call the other class and make the JTextArea act as a console
 
 
}
});
}
 
public static void main(String arg[]){
Easy frame=new Easy();
frame.setSize(300,100);
frame.setVisible(true);
}
}

import java.util.Scanner;
 
class AddNumber
{
   public static void main(String args[])
   {
      int x, y, z;
      System.out.println("Enter two numbers to be added ");
      Scanner in = new Scanner(System.in);
      x = in.nextInt();
      y = in.nextInt();
      z = x + y;
      System.out.println("Sum of entered numbers = "+z);
   }
}

Both codes work fine individually. Now, when I run the file Easy, and click on the "Start" button, I want the class AddNumber to be implemented. I mean to say that, instead of the AddNumber running on the console, is there any way I could make AddNumber run in the JTextArea i have created in the first class upon clicking the "Start" button? I thought maybe by action listener? But I'm not sure. Is there any other way to make my JTextArea act as a console for the other .java file?

Thanks

Your AddNumber class interacts with the console, so it doesn't matter where it is called, it will do just that. You're on the right path though for making your JTextArea resemble a console. Before tackling this problem, think about what the console does. For example, it can take in lots of input at once and process it. Likewise, it can output lots of data at once. You're going to have to use some form of I/O, such as an InputStream, OutputStream, BufferedReader, BufferedWriter, PipedInputStream, etc... . Next, you're going to have to tell your compiler that it should re-direct standard output from the console to a custom I/O. This can be done using the method System.setOut(PrintStream stream), where stream will encompass whatever I/O you've chosen. Similarly, you'll do the same for take in information using System.setIn(InputStream inStream). Next, you're going to have to override event listeners so when you press Enter, it will take in/print out information and move to the next line.

The second last step would be to make sure your program will constantly execute. You can use a Thread for this or a SwingWorker (similar to a Thread but designed for javax.swing components, which is what you're using).

The last step would be to adjust the fonts, background colour, foreground colour and make it look like a console.

Overall, if I were you, I'd start on something simpler and work your way up to this.