ActionListener java

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/*in main*/
button.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
			System.out.println('x');
  }
});

How to create an action listener in java

button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) 
            {
              
            }
        });

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