JTextField textField = new JTextField("Hello World"); textField.setOpaque(true);
JTextField textField = new JTextField("Hello World"); textField.setOpaque(false);In this example, the `setOpaque` method is called on `textField` to set it to be transparent, so any background color or image behind it will be visible. Package library: The `setOpaque` method is part of the `javax.swing` package library, which provides a collection of classes and interfaces for building graphical user interfaces (GUIs) in Java.