Force JScrollPane to Display a Scrollbar

Force JScrollPane to Display a Scrollbar

Some of us may like to use the null layout instead of any ready layout manager. However, when it comes to using JscrollPane or other scrollable components, I’ve found that the scrollbar is unable to appear even when the JComponent (such as a JPanel) is larger than the JScrollPane. The following code demonstrates a way to overcome this problem:

//enable the DefaultLookAndFeelDecorateJFrame.setDefaultLookAndFeelDecorated(true);//create a JFrame//JFrame jfr = new JFrame("Frame");//create a jpanel with null layout//JPanel jpn = new JPanel();jpn.setLayout(null);//create two label and add inside the jpanel, one at top and one at bottomJLabel label1, label2;label1 = new JLabel("Label 1"); label1.setBounds(2, 2, 100, 25);label2 = new JLabel("Label 2"); label2.setBounds(2, 300, 100, 25);jpn.add(label1); jpn.add(label2);//set jpanel size[viewable] to 180 x 350jpn.setPreferredSize(new Dimension(180, 350));//create scrollable component and assign jpanel to be viewJScrollPane jsp = new JScrollPane(jpn);//set jscrollpane size to 200x150jsp.setBounds(2, 2, 200, 150);jfr.setContentPane(jsp);jfr.setSize(210, 180);jfr.setVisible(true);

The most important thing is to remember to set your JComponent’s size by using the setPreferredSize(…) method and make sure JScrollPane is smaller than JPanel.

Share the Post:
data observability

Data Observability Explained

Data is the lifeblood of any successful business, as it is the driving force behind critical decision-making, insight generation, and strategic development. However, due to its intricate nature, ensuring the

Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved