public class Person { private String name; public void setName(String name) { this.name = name; } public String getName() { return this.name; } } Person person = new Person(); person.setName("John"); System.out.println(person.getName()); // Output: John
import javax.swing.*; public class ButtonExample extends JFrame { public ButtonExample() { JButton button = new JButton("Click me"); button.setName("myButton"); add(button); } public static void main(String[] args) { ButtonExample frame = new ButtonExample(); frame.setSize(300, 200); frame.setVisible(true); } } // Package library: javax.swingIn this example, the setName function is used to set the name of a button to "myButton". This code uses the Swing library package to create a GUI application.