Add separator to toolbar between buttons

Following example showcase how to add a separator to toolbar between buttons in a Java Swing application.

We are using the following APIs.

• JToolBar − To create a toolbar.

• JToolBar().add(component) − To add a component to the toolbar.

• JToolBar().addSeparator(dimension) − To add required spacing between button on the toolbar.

Example

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToolBar;

public class SwingTester {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;

   public SwingTester(){
      prepareGUI();
   }
   public static void main(String[] args){
      SwingTester swingControlDemo = new SwingTester();      
      swingControlDemo.showTableDemo();
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java Swing Examples");
      mainFrame.setSize(500,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new JLabel("", JLabel.CENTER);        
      statusLabel = new JLabel("",JLabel.CENTER);    
      statusLabel.setSize(350,100);

      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   private void showTableDemo(){
      headerLabel.setText("Control in action: JToolbar"); 
      JToolBar toolBar = new JToolBar("Toolbar");
      
      JButton buttonA = new JButton("Alpha");
      JButton buttonB = new JButton("Beta");
      JButton buttonC = new JButton("Gamma");
      toolBar.add(buttonA);
      toolBar.add(buttonB);
	  toolBar.addSeparator(new Dimension(100,10));
      toolBar.add(buttonC);          
      controlPanel.add(toolBar);
      mainFrame.setVisible(true);     
   } 
}

Output