import java.awt.Color;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

/**
*
* @author
*/
public class DataModel extends JFrame {

private ArrayList<Double> data;
private BarFrame barFrame;

public DataModel(ArrayList<Double> data) {
   this.data = data;
}

public void attach(BarFrame barFrame) {
   this.barFrame = barFrame;
}

public ArrayList<Double> getData() {
   return data;
}

public BarFrame getBarFrame() {
   return barFrame;
}

}

class TextFrame extends JFrame {

private DataModel model;
private JTextField[] textFields;

public TextFrame(DataModel model) {
   super("Text Frame");
   this.model = model;
   setLayout(new FlowLayout());
   final int FIELD_WIDTH = 20;

   ArrayList<Double> data = model.getData();

   textFields = new JTextField[data.size()];

   /**
      * add text field to the frame
      * add action listener
      * bar frame will update when user press enter on the text field
      */
   for (int i = 0; i < textFields.length; i++) {
         // create field
         textFields[i] = new JTextField(FIELD_WIDTH);
         textFields[i].setText(data.get(i) + "");

         // add to frame
         add(textFields[i]);
         JTextField jtf = textFields[i];
         int index = i;

         // add listener
         jtf.addActionListener(event -> {
            BarFrame bf = model.getBarFrame();
            if (bf != null) {
               try {
                     // parser input
                     double val = Double.parseDouble(jtf.getText().trim());
                     // update data
                     data.set(index, val);
                     // update the bar frame
                     bf.update();
               } catch (Exception e) {
                     JOptionPane.showMessageDialog(null,
                           "Invalid number in text field #" + index,
                           "Error", JOptionPane.ERROR_MESSAGE);
               }
            }
         });
   }

Complete in Java: This program should have three screens; 1. Ti...