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 ",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"); } }