Question

Simple java GUI language translator. English to Spanish, French, or German

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class translatorApp extends JFrame implements ActionListener {

   public static final int width = 500;
   public static final int height = 300;
   public static final int no_of_lines = 10;
   public static final int chars_per_line = 20;

   private JTextArea lan1;
   private JTextArea lan2;

   public static void main(String[] args){

       translatorApp gui = new translatorApp();
       gui.setVisible(true);

   }

   public translatorApp(){

       super("language translator");
       setSize(width, height);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setLayout(new GridLayout(2,1));



       JPanel biggerPanel = new JPanel();
       biggerPanel.setLayout(new FlowLayout());
       biggerPanel.setBackground(Color.LIGHT_GRAY);




       lan1 = new JTextArea("enter source text here \n",no_of_lines,chars_per_line);
       lan1.setEditable(true);
       lan1.setLineWrap(true);
       biggerPanel.add(lan1);




       lan2 = new JTextArea(no_of_lines,chars_per_line);
       lan2.setEditable(true);
       lan2.setLineWrap(true);
       biggerPanel.add(lan2);


       add(biggerPanel);



       JPanel buttonsPanel = new JPanel();
       buttonsPanel.setLayout(new FlowLayout());
       buttonsPanel.setBackground(Color.LIGHT_GRAY);


       JButton translate = new JButton("translate!");
       translate.addActionListener(this);
       buttonsPanel.add(translate);


       JButton clear = new JButton("Clear");
       clear.addActionListener(this);
       buttonsPanel.add(clear);

       add(buttonsPanel);
   }

   public void actionPerformed(ActionEvent e){

       String buttonText = e.getActionCommand();

       if(buttonText.equals("translate!"))
           lan2.setText(lan2.getText());
       else if(buttonText.equals("Clear"))
           {
           lan1.setText("");
           lan2.setText("");
           }
           else
           lan2.setText("error occured");
   }
}

Answer 1

I have highlighted the modified code.

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class translatorApp extends JFrame implements ActionListener {

public static final int width = 500;
public static final int height = 300;
public static final int no_of_lines = 10;
public static final int chars_per_line = 20;

private JTextArea lan1;
private JTextArea lan2;

public static void main(String[] args){

translatorApp gui = new translatorApp();
gui.setVisible(true);

}

public translatorApp(){

super("language translator");
setSize(width, height);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new java.awt.GridLayout(2,1));

JPanel biggerPanel = new JPanel();
biggerPanel.setLayout(new FlowLayout());
biggerPanel.setBackground(Color.LIGHT_GRAY);

lan1 = new JTextArea("enter source text here \n",no_of_lines,chars_per_line);
lan1.setEditable(true);
lan1.setLineWrap(true);
biggerPanel.add(lan1);

lan2 = new JTextArea(no_of_lines,chars_per_line);
lan2.setEditable(true);
lan2.setLineWrap(true);
biggerPanel.add(lan2);

add(biggerPanel);

JPanel buttonsPanel = new JPanel();
buttonsPanel.setLayout(new FlowLayout());
buttonsPanel.setBackground(Color.LIGHT_GRAY);

JButton translate = new JButton("translate!");
translate.addActionListener(this);
buttonsPanel.add(translate);

JButton clear = new JButton("Clear");
clear.addActionListener(this);
buttonsPanel.add(clear);

add(buttonsPanel);
}

public void actionPerformed(ActionEvent e){

String buttonText = e.getActionCommand();

if(buttonText.equals("translate!"))
lan2.setText(lan2.getText());
else if(buttonText.equals("Clear"))
{
       lan1.setText("");
       lan2.setText("");
}
else
    lan2.setText("error occured");
}
}