Question

I want to make the JText area scrollable.. but my result doesn't work in that way. help me plz.

package m5;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class TextAnalyzer extends JFrame implements ActionListener
{

   //Initializes component variables for the frame
  
   //For text typing area
   JLabel type = new JLabel("Type sentences in the box below.", JLabel.CENTER);
   JTextArea txt = new JTextArea(10, 10);

   JPanel txt1 = new JPanel();
  
   //For Statistic data area with a panel
   JLabel nwords = new JLabel("Number of words: ");
   JPanel nwords2 = new JPanel();
  
   JLabel lwords = new JLabel("Average words length: ");
   JPanel lwords2 = new JPanel();
  
   JLabel nchars = new JLabel("Number of characters: ");
   JPanel nchars2 = new JPanel();
  
   JButton button = new JButton("Show Statistics!");

   JPanel stat = new JPanel();
  
  
   public TextAnalyzer()
   {
       setTitle("COMP Assigmnet M5-1");
       type.setFont(new Font("Helvetica", Font.BOLD, 15));
      
      
       //Sets texts in the JTextArea would be wrapped
       txt.setLineWrap(true);
       txt.setWrapStyleWord(true);
      
      
       //Sets BorderLayout as a layout for the text typing area
       txt1.setLayout(new BorderLayout());
       txt1.setAlignmentX(Component.CENTER_ALIGNMENT);
       txt1.add(type, BorderLayout.NORTH);
       txt1.add(txt, BorderLayout.CENTER);       
      
      
       //Sets BoxLayout as a layout for the statistics area
       //Added a titled border using BorderFactory
       //Added small area between labels using Box.createRigidArea methods
       Box statBox = new Box(BoxLayout.Y_AXIS);
       statBox.setAlignmentX(Component.CENTER_ALIGNMENT);
       setLayout(new BoxLayout(statBox, BoxLayout.Y_AXIS));
       statBox.setBorder(BorderFactory.createTitledBorder("Statistics"));
       statBox.add(Box.createRigidArea(new Dimension(8,5)));
       statBox.add(nwords);
       statBox.add(Box.createRigidArea(new Dimension(8,5)));
       statBox.add(nchars);
       statBox.add(Box.createRigidArea(new Dimension(8,5)));
       statBox.add(lwords);
       statBox.add(Box.createRigidArea(new Dimension(8,20)));
       statBox.add(button);
       statBox.add(Box.createRigidArea(new Dimension(8,20)));
      
      
       //Sets BorderLayout as a layout for the whole window
       setLayout(new BorderLayout());
       add(txt1, BorderLayout.CENTER); add(statBox, BorderLayout.SOUTH);
  
      
       //Sets button as a action listener
       button.addActionListener(this);
      
       //Sets for the window to be closed by clicking 'x' button on the window
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   }
  
  
   //Defines actionPerfomed methods with a possible exception
   //Defines actions that would happen when the listener events occur
   public void actionPerformed(ActionEvent evt) throws ArithmeticException
   {
       //Sets input segment as a input data of text area
       //Makes a string list 'input' for the scanner to save segments in that obtained by next() method
       String segment = txt.getText();
       Scanner scan = new Scanner(segment);
       ArrayList <String> input = new ArrayList<String>();
       int wordLength = 0;

      
       //Receive number of words by getting the size of the arraylist
       while (scan.hasNext())
           input.add(scan.next());
       nwords.setText("Number of words: " + input.size());
      
      
       //Iterates items inside the arraylist and accumulates the number of whole characters by string.length() method to get number of characters
       for (String items: input)
           wordLength += items.length();
       nchars.setText("Number of characters: " + wordLength);
      
      
       //Gets average words length by dividing number of characters by number of words
       //Uses try and catch block to catch a exception that could be thrown when the nothing was written in the text area
       double a = 0;
       try
       { a = wordLength/input.size(); }
       catch (ArithmeticException problem)
   { a = 0; }
       finally
       { lwords.setText("Average words length: " + a); }
   }
  
   //Initiates an object of TextAnalyzer as a JFrame and sets its size
   public static void main(String[] args)
   {
       TextAnalyzer app = new TextAnalyzer();
       app.pack();
       app.setSize(500, 400);
       app.setVisible(true);
   }
  
}

Answer 1

/*****************************TextAnalyzer.java***********************/

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class TextAnalyzer extends JFrame implements ActionListener {

   // Initializes component variables for the frame

   // For text typing area
   JLabel type = new JLabel("Type sentences in the box below.", JLabel.CENTER);
   JTextArea txt = new JTextArea(10, 10);
   JScrollPane scroll = new JScrollPane(txt);//add scrollPane
   JPanel txt1 = new JPanel();

   // For Statistic data area with a panel
   JLabel nwords = new JLabel("Number of words: ");
   JPanel nwords2 = new JPanel();

   JLabel lwords = new JLabel("Average words length: ");
   JPanel lwords2 = new JPanel();

   JLabel nchars = new JLabel("Number of characters: ");
   JPanel nchars2 = new JPanel();

   JButton button = new JButton("Show Statistics!");

   JPanel stat = new JPanel();

   public TextAnalyzer() {
       setTitle("COMP Assigmnet M5-1");
       type.setFont(new Font("Helvetica", Font.BOLD, 15));

       // Sets texts in the JTextArea would be wrapped
       txt.setLineWrap(true);
       txt.setWrapStyleWord(true);

       // Sets BorderLayout as a layout for the text typing area
       txt1.setLayout(new BorderLayout());
       txt1.setAlignmentX(Component.CENTER_ALIGNMENT);
       txt1.add(type, BorderLayout.NORTH);
       txt1.add(scroll, BorderLayout.CENTER);

       // Sets BoxLayout as a layout for the statistics area
       // Added a titled border using BorderFactory
       // Added small area between labels using Box.createRigidArea methods
       Box statBox = new Box(BoxLayout.Y_AXIS);
       statBox.setAlignmentX(Component.CENTER_ALIGNMENT);
       setLayout(new BoxLayout(statBox, BoxLayout.Y_AXIS));
       statBox.setBorder(BorderFactory.createTitledBorder("Statistics"));
       statBox.add(Box.createRigidArea(new Dimension(8, 5)));
       statBox.add(nwords);
       statBox.add(Box.createRigidArea(new Dimension(8, 5)));
       statBox.add(nchars);
       statBox.add(Box.createRigidArea(new Dimension(8, 5)));
       statBox.add(lwords);
       statBox.add(Box.createRigidArea(new Dimension(8, 20)));
       statBox.add(button);
       statBox.add(Box.createRigidArea(new Dimension(8, 20)));

       // Sets BorderLayout as a layout for the whole window
       setLayout(new BorderLayout());
       add(txt1, BorderLayout.CENTER);
       add(statBox, BorderLayout.SOUTH);

       // Sets button as a action listener
       button.addActionListener(this);

       // Sets for the window to be closed by clicking 'x' button on the window
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   }

   // Defines actionPerfomed methods with a possible exception
   // Defines actions that would happen when the listener events occur
   public void actionPerformed(ActionEvent evt) throws ArithmeticException {
       // Sets input segment as a input data of text area
       // Makes a string list 'input' for the scanner to save segments in that obtained
       // by next() method
       String segment = txt.getText();
       Scanner scan = new Scanner(segment);
       ArrayList<String> input = new ArrayList<String>();
       int wordLength = 0;

       // Receive number of words by getting the size of the arraylist
       while (scan.hasNext())
           input.add(scan.next());
       nwords.setText("Number of words: " + input.size());

       // Iterates items inside the arraylist and accumulates the number of whole
       // characters by string.length() method to get number of characters
       for (String items : input)
           wordLength += items.length();
       nchars.setText("Number of characters: " + wordLength);

       // Gets average words length by dividing number of characters by number of words
       // Uses try and catch block to catch a exception that could be thrown when the
       // nothing was written in the text area
       double a = 0;
       try {
           a = wordLength / input.size();
       } catch (ArithmeticException problem) {
           a = 0;
       } finally {
           lwords.setText("Average words length: " + a);
       }
   }

   // Initiates an object of TextAnalyzer as a JFrame and sets its size
   public static void main(String[] args) {
       TextAnalyzer app = new TextAnalyzer();
       app.pack();
       app.setSize(500, 400);
       app.setVisible(true);
   }

}

/********************output*********************/

Please let me know if you have any doubt or modify the answer, Thanks :)