JFrame with Multiple JPanels Example

A JPanel is an invisible window on which they are located and arranged the elements in the window. We can insert any type of components within a panel, including other panels. This feature is essential when creating complex graphical interfaces you have to use different Layout Managers.

The usual procedure is to put a panel on first build, add components you want and then insert it into the appropriate container.

• public JPanel () constructor;
• public JPanel (LayoutManager layout) Creates a new JPanel with the given design that is passed;
• public Component add (Component comp) is the method used to Add components to the panel. Returns the same component that is passed;
• public setLayout (Layout Manager l): sets the given layout manager;
• public void remove (Component c) removes the component

import javax.swing.*; 
 import java.awt.*; 
 public class MultiplePanelsJavaExample extends JFrame 
    { 
        private JButton BtnOne = new JButton("One"); 
        private JButton BtnTwo = new JButton("Two"); 
        private JButton BtnThree = new JButton("Three"); 
        private JButton BtnFour = new JButton("Four"); 
        private JButton BtnFive = new JButton("Five"); 
        private JButton BtnSix = new JButton("Six"); 
        private JButton BtnSvn = new JButton("Seven"); 
        private JButton BtnEight = new JButton("Eight"); 
        private JButton BtnNine = new JButton("Nine"); 
        private JButton BtnTen = new JButton("Ten"); 
        private JButton BtnElvn = new JButton("Eleven"); 
        private JButton BtnTwlv = new JButton("Twelve"); 
        private JPanel PnlOne = new JPanel(new GridLayout(2, 0)); 
        private JPanel PnlTwo = new JPanel(new FlowLayout()); 
        private JPanel PnlThree = new JPanel(new FlowLayout()); 
        private JPanel PnlFour = new JPanel(new GridLayout(2, 0)); 
         public MultiplePanelsJavaExample() 
            { 
               setLayout(new BorderLayout()); 
               add(PnlOne, BorderLayout.WEST); 
               add(PnlTwo, BorderLayout.CENTER); 
               add(PnlThree, BorderLayout.SOUTH); 
               add(PnlFour, BorderLayout.EAST); 
               PnlOne.add(BtnOne); 
               PnlOne.add(BtnTwo); 
               PnlOne.add(BtnThree); 
               PnlTwo.add(BtnFour); 
               PnlTwo.add(BtnFive); 
               PnlTwo.add(BtnSix); 
               PnlThree.add(BtnSvn); 
               PnlFour.add(BtnEight); 
               PnlFour.add(BtnNine); 
               PnlFour.add(BtnTen); 
               PnlFour.add(BtnElvn); 
               PnlFour.add(BtnTwlv); 
               setSize(400,250); 
               setVisible(true); 
            } 
               public static void main(String[] args) 
                   { 
                       MultiplePanelsJavaExample frame = new MultiplePanelsJavaExample(); 
                   } 
    }