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Java anonymous inner class 🎭

Java anonymous inner class tutorial #java #anonymous #class public class Main { public static void main(String[] args) { /*anonymous class = an inner class without a name only a single object is created from one The object may have “extras” or "changes" and no need to create a separate innerclass when it only need it once. Helps us to avoid cluttering code with a class name Syntax is similar to a constructor, except that there is also a class definition within a block of code. GREAT FOR LISTENERS */ MyFrame myFrame = new MyFrame(); } } import java.awt.event.*; import javax.swing.*; public class MyFrame extends JFrame{ JButton button1 = new JButton("Button #1"); JButton button2 = new JButton("Button #2"); JButton button3 = new JButton("Button #3"); MyFrame(){ button1.setBounds(100,100,100,100); button2.setBounds(200,100,100,100); button3.setBounds(300,100,100,100); button1.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.out.println("You pressed button #1"); } }); button2.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.out.println("You pressed button #2"); } }); button3.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.out.println("You pressed button #3"); } }); this.add(button1); this.add(button2); this.add(button3); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setSize(500, 500); this.setLayout(null); this.setVisible(true); } }