Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How can we add multiple sub-panels to the main panel in Java?
A JPanel is a subclass of JComponent class and it is an invisible component in Java. The FlowLayout is a default layout for a JPanel. We can add most of the components like buttons, text fields, labels, tables, lists, trees, etc. to a JPanel.
We can also add multiple sub-panels to the main panel using the add() method of Container class.
Syntax
public Component add(Component comp)
Example
import java.awt.*;
import javax.swing.*;
public class MultiPanelTest extends JFrame {
private JPanel mainPanel, subPanel1, subPanel2;
public MultiPanelTest() {
setTitle("MultiPanel Test");
mainPanel = new JPanel(); // main panel
mainPanel.setLayout(new GridLayout(3, 1));
mainPanel.add(new JLabel("Main Panel", SwingConstants.CENTER));
mainPanel.setBackground(Color.white);
mainPanel.setBorder(BorderFactory.createLineBorder(Color.black, 1));
subPanel1 = new JPanel(); // sub-panel 1
subPanel1.add(new JLabel("Panel One", SwingConstants.CENTER));
subPanel1.setBackground(Color.red);
subPanel2 = new JPanel(); // sub-panel 2
subPanel2.setBackground(Color.blue);
subPanel2.add(new JLabel("Panel Two", SwingConstants.CENTER));
mainPanel.add(subPanel1);
mainPanel.add(subPanel2);
add(mainPanel);
setSize(400, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
}
public static void main(String[] args) {
new MultiPanelTest();
}
}Output
Updated on: 03-Jul-2020
3K+ Views
Advertisements