In this tutorial we will learn to create multiple frames in java. Here we will be creating two classes for example OldWindow and NewWindow class respectively. OldWindow class will consist the actual logic for frame creation while the NewWindow class will have the design structure of JFrame .
- So, to learn to create multiple frames in java follow the steps given below :
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- First of all open up eclipse -> Go to File-> New-> Java Project, just select the Java Project as shown below :
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- After selecting Java Projet a dialog box will pop up asking for project details. So, fill the respective details and click on Finish button.
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- Now, you can view your project and select it from the package explorer present at the left hand side.
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- Now let’s create two new java classes called as OldWindow and NewWindow respectively. So, for generating these class, select your project -> right click on src -> New -> Class as shown below :
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- Now insert the respective class details :
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- Similarly, create NewWindow class and now you will be having your both the classes generated in your project in the package explorer.
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- Now open up OldWindow.java class and write the actual logic code, which will create JFrame, JButton and open up a New Frame to display.
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- Insert the given code in OldWindow.java class:
//import statement
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
//create class and extend with JFrame
public class OldWindow extends JFrame
{
//declare variable
private JPanel contentPane;
/**
* Launch the application.
*/
//main method
public static void main(String[] args)
{
/* It posts an event (Runnable)at the end of Swings event list and is
processed after all other GUI events are processed.*/
EventQueue.invokeLater(new Runnable()
{
public void run()
{
//try - catch block
try
{
//Create object of OldWindow
OldWindow frame = new OldWindow();
//set frame visible true
frame.setVisible(true);
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public OldWindow()//constructor
{
//set frame title
setTitle("Old Frame");
//set default close operation
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
//set bounds of the frame
setBounds(100, 100, 450, 300);
//create object of JPanel
contentPane = new JPanel();
//set border
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
//set ContentPane
setContentPane(contentPane);
//set null
contentPane.setLayout(null);
//create object of JButton and set label on it
JButton btnNewFrame = new JButton("New");
//add actionListener
btnNewFrame.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
//call the object of NewWindow and set visible true
NewWindow frame = new NewWindow();
frame.setVisible(true);
//set default close operation
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
});
//set font of the Button
btnNewFrame.setFont(new Font("Microsoft YaHei UI", Font.BOLD, 12));
//set bounds of the Button
btnNewFrame.setBounds(180, 195, 78, 25);
//add Button into contentPane
contentPane.add(btnNewFrame);
//set Label in the frame
JLabel lblThisIsOld = new JLabel("This is Old Frame");
//set foreground color to the label
lblThisIsOld.setForeground(Color.BLUE);
//set font of that label
lblThisIsOld.setFont(new Font("Times New Roman", Font.BOLD | Font.ITALIC, 24));
//set bound of the label
lblThisIsOld.setBounds(127, 82, 239, 39);
//add label to the contentPane
contentPane.add(lblThisIsOld);
}
}
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- Just follow the comments to understand the code.
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- Now, open your NewWindow.java class and add the given code which creates JFrame, JLabel into the New Frame.
//import statement
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
//create class and extend with JFrame
public class NewWindow extends JFrame
{
//declare variable
private JPanel contentPane;
/**
* Launch the application.
*/
//main method
public static void main(String[] args)
{
/* It posts an event (Runnable)at the end of Swings event list and is
processed after all other GUI events are processed.*/
EventQueue.invokeLater(new Runnable()
{
public void run()
{
//try - catch block
try
{
//Create object of NewWindow
NewWindow frame = new NewWindow();
//set frame visible true
frame.setVisible(true);
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public NewWindow() //constructor
{
//set frame title
setTitle("New Frame");
//set default close operation
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
//set bounds of the frame
setBounds(100, 100, 450, 300);
//create object of JPanel
contentPane = new JPanel();
//set border
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
//set ContentPane
setContentPane(contentPane);
//set null
contentPane.setLayout(null);
//label in the frame
JLabel lblWelcome = new JLabel("Welcome this is New Frame");
//set fore ground color to the label
lblWelcome.setForeground(Color.RED);
//set font to the label
lblWelcome.setFont(new Font("Times New Roman", Font.BOLD | Font.ITALIC, 24));
//set bounds of the label
lblWelcome.setBounds(75, 100, 294, 32);
//add label to the contentPane
contentPane.add(lblWelcome);
}
}
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- We are all done. Now, just select your project from the package explorer and run it.
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- You will have the following output:
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- After clicking the new button you will be navigated to new window as shown below:
Thus, we have successfully learnt to create multiple frames in java and navigated from one frame to another.
About the Author
JFrame is a window commonly used for stand-alone applications, like a warning window, or a notification window . Thanks for sharing this blog , keep blogging.