UpDown.java Please help me the JAVA program. WidgetView.java is given below. Ple

Question

UpDown.java

Please help me the JAVA program. WidgetView.java is given below. Please use WidgetView.java for your program. Please don't change WidgetView.java
Write a GUI that has the following widgets:

a button labeled "go up/down"

a label initialized to 0 (we'll call this the left label)

a label initialized to 0 (we'll call this the right label)

a button labeled "go down/up"

When the "go up/down" button is pushed, a random number between 1 and 10 (inclusive) is generated and added to the left label, and another random number between 1 and 10 (inclusive) is generated and subtracted from the right label.

When the "go down/up" button is pushed, a random number between 1 and 10 (inclusive) is generated and subtracted from the left label, and another random number between 1 and 10 (inclusive) is generated and added to the right label.

WidgetView.java - please use this program for display Swing widgets in a FlowLayout GUI.

import java.awt.event.ActionListener;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

import javax.swing.AbstractButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
* A really simple class to display Swing widgets in a FlowLayout GUI.
*

*
* @author parks
*/
public class WidgetView {
  
   public static final int DEFAULT_X_SIZE = 600;
   public static final int DEFAULT_Y_SIZE = 400;

private JFrame jframe;
private JPanel anchor;
private boolean userClicked = false;

private Lock lock;
private Condition waitingForUser;

private JComponent userInputComponent = null;
private ActionListener eventHandler;

/**
* Default constructor will display an empty JFrame that has a Flow layout
* JPanel as its content pane and initialize the frame to a default size.
*/
public WidgetView() {
   this(DEFAULT_X_SIZE, DEFAULT_Y_SIZE);
}
  
/**
* Constructor will display an empty JFrame that has a Flow layout
* JPanel as its content pane and initialize the frame to a given size.
*/
public WidgetView(int pixelSizeInX, int pixelSizeInY) {
lock = new ReentrantLock();
waitingForUser = lock.newCondition();
// lambda expression requires Java 8
eventHandler = e -> {
if (e.getSource() != userInputComponent) {
return;
}
lock.lock();
userClicked = true;
waitingForUser.signalAll();
lock.unlock();
};

/* java 7 solution
* eventHandler = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() != userInputComponent) {
return;
}
lock.lock();
userClicked = true;
waitingForUser.signalAll();
lock.unlock();
}
};
*/

jframe = new JFrame();
anchor = new JPanel();
jframe.setContentPane(anchor);
jframe.setSize(pixelSizeInX, pixelSizeInY);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.setVisible(true);
}

/**
* Add a Swing widget to the GUI.
*
* @param jcomp Swing widget (subclasses of JComponent--like JLabel and
* JTextField) to be added to the JFrame
*/
public void add(JComponent jcomp) {
anchor.add(jcomp);
jframe.setContentPane(anchor);
}

/**
* Add an Abstract Button (like a JButton) to the JFrame. Create an action
* listener to wait (suspend the caller) until it is clicked.
*
* @param absButton Button (like a JButton) to add to the JFrame
*/
public void addAndWait(AbstractButton absButton) {
userInputComponent = absButton;
absButton.addActionListener(eventHandler);

addWait(absButton);
}

/**
* Add a JTextField to the JFrame, and wait for the user to put the cursor
* in the field and click Enter. The caller is suspended until enter is
* clicked.
*
* @param jTextField Field to add to the JFrame
*/
public void addAndWait(JTextField jTextField) {
userInputComponent = jTextField;
jTextField.addActionListener(eventHandler);

addWait(jTextField);
}

private void addWait(JComponent jcomp) {
add(jcomp);
lock.lock();
try {
while (!userClicked) {
waitingForUser.await();
}
}
catch (InterruptedException e1) {
System.err.println("WidgetView reports that something really bad just happened");
e1.printStackTrace();
System.exit(0);
}
userClicked = false;
waitingForUser.signalAll();
lock.unlock();
}
}

------------------------------------------------------

WidgetViewActionEvent.java

import java.awt.event.ActionListener;

public abstract class WidgetViewActionEvent implements ActionListener {

}

------------------------------------------------------

===================

here is example program, may help you how WidgetView and WidgetViewActionEvent work:

Piggy.java

ublic class Piggy {
  
   private int quarter;
   private int dime;
  
   public Piggy() {
       quarter = 0;
       dime = 0;
   }
  
   public void addDime() {
       dime++;
   }
  
   public void addQuarter() {
       quarter++;
   }
  
   public int getValue() {
       return quarter * 25 + dime * 10;
   }
  
   public String toString() {
       return getValue() + " cents, quarter: " + quarter + " dime: " + dime;
   }

}

==========

GuiPiggy.java

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

public class GuiPiggy {

private Piggy bank;
private JTextArea history;
private JButton dime;
private JButton quarter;

public GuiPiggy(Piggy piggyBank) {
bank = piggyBank;
WidgetView wv = new WidgetView();

dime = new JButton("add dime");
dime.addActionListener(new ButtonAction(bank));
quarter = new JButton("add quarter");
quarter.addActionListener(new ButtonAction(bank));
history = new JTextArea();

wv.add(dime);
wv.add(quarter);
wv.add(history);
}

class ButtonAction extends WidgetViewActionEvent{

private Piggy myBank;

ButtonAction(Piggy bank){
myBank = bank;
}
@Override
public void actionPerformed(ActionEvent e){
if (e.getSource() == dime){
myBank.addDime();

}
else {
myBank.addQuarter();
}
history.append(" " + bank.toString());
}
}

}

============

PiggyGuiMain.java

public class PiggyGuiMain {

   public static void main(String[] args) {

       new GuiPiggy(new Piggy());
   }

}

---------------------------------------

Note to expert: I already gave you WidgetView, WidgetViewActionEvent. please don't change those programs.

-------------------------------------------

PiggyGuiMain.java, GuiPiggy.java and Piggy.java are just example programs. I just post here for you know how WidgetView and WidgetViewActionEvent work.

Thank you for your help.

Explanation / Answer

code for UpDown.java class

package swingexample;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.Random;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.border.Border;

public class UpDown {

//create labels

private JLabel left_label;

private JLabel right_label;

  

//create buttons

private JButton up_down;

private JButton down_up;

  

public UpDown(){

//object of WidgetView class is created

WidgetView wv = new WidgetView();

  

//intialize button Up/down and add to Action class i.e. buttonAction

up_down = new JButton("Up/Down");

up_down.addActionListener(new ButtonAction());

  

//intialize button down/up and add to Action class i.e. buttonAction

down_up = new JButton("Down/Up");

down_up.addActionListener(new ButtonAction());

  

//intialize label leftLabel

left_label = new JLabel();

left_label.setText(Integer.toString(0));

  

//intialize label righttLabel

right_label = new JLabel();

right_label.setText(Integer.toString(0));

  

//add buttons up/down and down/up in widgetView

wv.add(up_down);

wv.add(down_up);

//add labels left and right in widgetView

wv.add(left_label);

wv.add(right_label);

  

}

class ButtonAction extends WidgetViewActionEvent {

Random randomno1 = new Random();

Random randomno2 = new Random();

int num1,num2;

public ButtonAction() //constructor of buttonAction class

{

//creating random number

num1 =randomno1.nextInt(10);

num2 =randomno2.nextInt(10);

}

//when any button is clicked

@Override

public void actionPerformed(ActionEvent e) {

//check whether button up/down is clicked

if (e.getSource() == up_down){

int temp_left=Integer.parseInt(left_label.getText()); //get value from left label

int newValL=num1+temp_left; // random value is added

left_label.setText(Integer.toString(newValL)); // set value to the left label

int temp_right=Integer.parseInt(right_label.getText()); //get value from right label

int newValR=num2-temp_right; //random value is subtracted

right_label.setText(Integer.toString(newValR)); //set value to right label

}

//check whether button down/up is clicked

else if(e.getSource() == down_up){

int temp_left=Integer.parseInt(left_label.getText());//get value from left label

int newValL=num1-temp_left; // random value is subtracted

left_label.setText(Integer.toString(newValL)); //set value to left label

int temp_right=Integer.parseInt(right_label.getText());//get value from right label

int newValR=num2+temp_right; // random value is added

right_label.setText(Integer.toString(newValR)); //set value to right label

}

}

}

/**

*main method

* @param args the command line arguments

*/

public static void main(String[] args) {

new UpDown();// creating object of updown class

}

}

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.