Update your "word occurrences" application. Add unit testing to the word occurrences class. Perform this task using JUnit.

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Word occurrences application:

import javax.swing.; import java.awt.; class gui { public static void main(String args[]) { JFrame frame = new JFrame("Chat Frame"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(400, 400); JMenuBar mb = new JMenuBar(); JMenu m1 = new JMenu("FILE"); JMenu m2 = new JMenu("Help"); mb.add(m1); mb.add(m2); JMenuItem m11 = new JMenuItem("Open"); JMenuItem m22 = new JMenuItem("Save as"); m1.add(m11); m1.add(m22); JPanel panel = new JPanel(); JLabel label = new JLabel("Enter Text"); JTextField tf = new JTextField(10); JButton send = new JButton("Send"); JButton reset = new JButton("Reset"); panel.add(label); panel.add(tf); panel.add(send); panel.add(reset); JTextArea ta = new JTextArea(); frame.getContentPane().add(BorderLayout.SOUTH, panel); frame.getContentPane().add(BorderLayout.NORTH, mb); frame.getContentPane().add(BorderLayout.CENTER, ta); frame.setVisible(true); } }