With this example we are going to see how to set scroll bar policy in a JScrollPane container. This is very useful when you want to further customize your scroll bars.
Basically all you have to do to set scroll bar policy in a JScrollPane is:
- Create a new
JFrame. - Create a new
JTextArea. - Create a new
JScrollPanewith the above text area. - Use
setHorizontalScrollBarPolicy,setVerticalScrollBarPolicyto set the scroll bar policy.
Let’s see the code:
package com.javacodegeeks.snippets.desktop;
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class SetScrollbarPolicyInJScrollPaneContainer {
private static final long serialVersionUID = 1L;
private static void createAndShowGUI() {
// Create and set up the window.
final JFrame frame = new JFrame("Scroll Pane Example");
// Display the window.
frame.setSize(200, 200);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// set flow layout for the frame
frame.getContentPane().setLayout(new FlowLayout());
JTextArea textArea = new JTextArea(5, 5);
JScrollPane scrollableTextArea = new JScrollPane(textArea);
// determine when the horizontal scrollbar appears in the scrollpane
int horizontalPolicy = JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED;
// int horizontalPolicy = JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS;
// int horizontalPolicy = JScrollPane.HORIZONTAL_SCROLLBAR_NEVER;
// determine when the vertical scrollbar appears in the scrollpane
int vericalPolicy = JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED;
// int vericalPolicy = JScrollPane.VERTICAL_SCROLLBAR_ALWAYS;
// int vericalPolicy = JScrollPane.VERTICAL_SCROLLBAR_NEVER;
scrollableTextArea.setHorizontalScrollBarPolicy(horizontalPolicy);
scrollableTextArea.setVerticalScrollBarPolicy(vericalPolicy);
frame.getContentPane().add(scrollableTextArea);
}
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() {
createAndShowGUI();
}
});
}
}
This was an example on how to set scroll bar policy in a JScrollPane container.
