Get/Set divider size in JSplitPane

This is an example on how to get or set the size of the divider in a JSplitPane component of a Java Desktop Application.

In order to do that you have to follow these steps:

Let’s see the code snippet that follows.

package com.javacodegeeks.snippets.desktop;
import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
public class GetSetDividerSizeInJSplitPane {
	private static void createAndShowGUI() {
		// Create and set up the window.
		final JFrame frame = new JFrame("Split Pane Example");
		// Display the window.
		frame.setSize(500, 300);
		// set flow layout for the frame
		frame.getContentPane().setLayout(new FlowLayout());
		String[] options1 = { "Bird", "Cat", "Dog", "Rabbit", "Pig" };
		JList list1 = new JList(options1);
		String[] options2 = { "Car", "Motorcycle", "Airplane", "Boat" };
		JList list2 = new JList(options2);
		JScrollPane scrollPane1 = new JScrollPane(list1);
		JScrollPane scrollPane2 = new JScrollPane(list2);
		JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, scrollPane1, scrollPane2);
		splitPane.setPreferredSize(new Dimension(400, 200));
		// get the current divider size (pixels)
		int dividerLocation = splitPane.getDividerSize();
		System.out.println("Divider Size before: " + dividerLocation);
		// set new divider size
		System.out.println("Divider Size after: " + splitPane.getDividerSize());
	public static void main(String[] args) {
  //Schedule a job for the event-dispatching thread:
  //creating and showing this application's GUI.
  javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {


Divider Size before: 10 Divider Size after: 2

This was an example on how to get and set the divider size in JSplitPane.

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