JButton in Java Swing Tutorial Tutorials Field

Hello Friends, Welcome to another tutorial. In this tutorial, we will learn about JButton in Java Swing. In my previous tutorials, we have learned about JFrame, JLabel and JTextField classes of Java swing, and now we will be learning about another interesting component: JButton.

So let’s get started to JButton in Java Swing Tutorial,

JButton in Java Swing

What is JButton in Java ??

It is a class in package javax.swing that is used to display a button on the screen .

Basically it provides the functionality of a push button.
It allows an icon,a string or both to be associated with the push button.
Whenever the button is pressed an ActionEvent is generated.

It’s three constructors are :-
- JButton(String str )
- JButton(Icon icon )
- JButton(String str,Icon icon )

So this was the brief description of JButton class in Java Swing and now we will know how to create a JButton.

Creating a JButton in Java Swing

For creating a JButton we will create the object of the JButton class and we will pass a string ( within quotes ) to it’s constructor.Example- JButton btn=new JButton (“click me “);

Programming code is given below :

import javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
                //creating object of JButton class and passing String to it's constructor
		JButton btn=new JButton("click me ");
                //Setting the location and size of the JButton
		btn.setBounds(50,50,100,50);
                //adding JButton to the frame's content pane 
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

import javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

//creating object of JButton class and passing String to it's constructor

JButton btn=new JButton("click me ");

//Setting the location and size of the JButton

btn.setBounds(50,50,100,50);

//adding JButton to the frame's content pane

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output :

Changing Text of The JButton Dynamically

We can change the text of the JButton dynamically(explicitly) at any time using the setText() method .

We just have to call the setText() method using the object of the JButton class and have to pass any text(within quotes) as an argument .
The previous text written will be overriden by the new text.
Programming code is given below :

import javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
		JButton btn=new JButton("click me ");
		btn.setBounds(50,50,100,50);
                //changing text of JButton dynamically using setText() method
		btn.setText("mybutton");
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

import javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

JButton btn=new JButton("click me ");

btn.setBounds(50,50,100,50);

//changing text of JButton dynamically using setText() method

btn.setText("mybutton");

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output :

As we can see in the above image we have changed the text of JButton and the previous written text in constructor is overriden by the new text.

Setting Image In JButton

For setting image in JButton we will follow the same exact steps as we have followed while we were setting image in JLabel.

Programming code is given below :

import javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
                //Creating object of ImageIcon class
		ImageIcon icon=new ImageIcon("java.png");
		JButton btn=new JButton(icon);
                //setting the size and location of the JButton Image
		btn.setBounds(50,50,icon.getIconWidth(),icon.getIconHeight());
                //adding JButton to the frame's content pane 
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

import javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

//Creating object of ImageIcon class

ImageIcon icon=new ImageIcon("java.png");

JButton btn=new JButton(icon);

//setting the size and location of the JButton Image

btn.setBounds(50,50,icon.getIconWidth(),icon.getIconHeight());

//adding JButton to the frame's content pane

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output:

Setting the Font Style And Font Size of JButton Text

The process is same as we did when we were dealing with JLabel.

Programming code is given below :

import javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
		JButton btn=new JButton("myButton");
		btn.setBounds(50,50,300,100);
                //creating object of the Font class
		Font fo=new Font("Arial",Font.ITALIC,20);
                //calling setFont() method
		btn.setFont(fo);
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

import javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

JButton btn=new JButton("myButton");

btn.setBounds(50,50,300,100);

//creating object of the Font class

Font fo=new Font("Arial",Font.ITALIC,20);

//calling setFont() method

btn.setFont(fo);

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output :

Setting the Font Color of JButton

For setting the Font Color of JButton we will use a method setForeground() method and we will follow the same exact process while we were dealing with setting the Font color of JTextField.

Programming code is given below :

import javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
		JButton btn=new JButton("myButton");
		btn.setBounds(50,50,100,100);
                //calling setForeground() method
		btn.setForeground(Color.RED);
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

import javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

JButton btn=new JButton("myButton");

btn.setBounds(50,50,100,100);

//calling setForeground() method

btn.setForeground(Color.RED);

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output :

Setting the Background Color of JButton

For setting the background color of JButton we will use the setBackground() method.

Programming code is given below :

import javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
		JButton btn=new JButton("myButton");
		btn.setBounds(50,50,100,100);
		btn.setForeground(Color.RED);
                //calling the setBackground() method
		btn.setBackground(Color.YELLOW);
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

import javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

JButton btn=new JButton("myButton");

btn.setBounds(50,50,100,100);

btn.setForeground(Color.RED);

//calling the setBackground() method

btn.setBackground(Color.YELLOW);

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output :

Setting Different Type of Cursor for a JButton

Now we will see how to set different type of cursor for a JButton.

For this we need to create an object of the Cursor class and in it’s constructor we will pass a cursor constant which is already defined in the Cursor class.(Example-Cursor.HAND_CURSOR).
Now for applying it into JButton we will call a method setCursor() using the object of the JButton class and in its argument we will pass the object of Cursor class .
Programming code is given below :

mport javax.swing.*;
import java.awt.*;
public class myJButton
{
	public static void main(String args[] )
	{
		JFrame f= new JFrame();
		f.setTitle("myJButton");
		f.setVisible(true);
		f.setSize(1000,500);
		Container c= f.getContentPane();
		c.setLayout(null);
		JButton btn=new JButton("myButton");
		btn.setBounds(50,50,100,100);
		btn.setForeground(Color.RED);
		btn.setBackground(Color.YELLOW);
                //creating object of the cursor class 
		Cursor cur=new Cursor(Cursor.HAND_CURSOR);
                //calling the setCursor() method 
		btn.setCursor(cur);
		f.add(btn);
	
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	}
}

mport javax.swing.*;

import java.awt.*;

public class myJButton

{

public static void main(String args[] )

{

JFrame f= new JFrame();

f.setTitle("myJButton");

f.setVisible(true);

f.setSize(1000,500);

Container c= f.getContentPane();

c.setLayout(null);

JButton btn=new JButton("myButton");

btn.setBounds(50,50,100,100);

btn.setForeground(Color.RED);

btn.setBackground(Color.YELLOW);

//creating object of the cursor class

Cursor cur=new Cursor(Cursor.HAND_CURSOR);

//calling the setCursor() method

btn.setCursor(cur);

f.add(btn);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Output :

As we can see in the above image we have changed the cursor (HAND_CURSOR). We can also use different type of cursors which is defined in the cursor class.

So guys Let me know if you are having any difficulties while understanding this JButton in Java Swing tutorial.

8 thoughts on “JButton in Java Swing Tutorial”

Umesh

September 13, 2016 at 8:26 pm

Nice work bhai.. Carry on

Easyprogram4u
- Mehtab Hameed
  
  September 14, 2016 at 2:18 am
  
  Thaku bro 🙂
Chrinstine

September 20, 2016 at 5:33 am

There is definately a lot to learn about this subject.
I like all of the points you’ve made. http://bing.co.uk
- Mehtab Hameed
  
  September 20, 2016 at 12:43 pm
  
  Thank You 🙂
Joselyn

November 8, 2016 at 11:07 am

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KP

February 16, 2018 at 11:45 pm

Hello,
I liked your work very much,
the way you describe every step , it is very helpful.
It helped me to understand many basic points.
I request you to upload more tutorials frequently Please.
Just put up more Tutorial for swing and GUI applicaiton and database connectivity.
you can also share jsp and servlet tutorial.
- Mehtab Hameed
  
  February 17, 2018 at 7:00 am
  
  Thank You so Much
  Stay Connected
kiran

August 17, 2018 at 9:19 am

nice explanation sir add more topic of object oriented programming through java