Question

Write a program in Java (using swing) that opens a window that contains a button. The button is labled with "0" (zero).

With every click on the button, the number in its label increments by 1.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

//ButtonClickCounter.java

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

public class ButtonClickCounter extends JFrame implements ActionListener {

          // declaring button

          private JButton button;

          // constructor to initialize the GUI

          public ButtonClickCounter() {

                   // initializing button with value 0

                   button = new JButton("0");

                   // adding action listener to the buttton

                   button.addActionListener(this);

                  

                   //using flow layout as the layout manager

                   setLayout(new FlowLayout());

                  

                   //adding button to the frame

                   add(button);

                  

                   // setting up and displaying the window

                   setDefaultCloseOperation(EXIT_ON_CLOSE);

                   setSize(200, 100);

                   setVisible(true);

          }

          public static void main(String[] args) {

                   // initializing the GUI

                   new ButtonClickCounter();

          }

          @Override

          public void actionPerformed(ActionEvent e) {

                   //getting the current number from the button as an integer

                   int current = Integer.parseInt(button.getText());

                   //incrementing it

                   current++;

                   //updating the button with new number

                   button.setText("" + current);

          }

}

/*OUTPUT*/

/* after some clicks */