问Java:检查鼠标是否已单击

EN

import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;


public class tuna extends JFrame
{
private JTextArea textArea;



public static void main(String[] args)
{
  //Run the program
tuna run = new tuna();
run.setDefaultCloseOperation(3);
run.setSize(1200, 1000);

run.setVisible(true);
}

public tuna()
{


  super("Simple JFrame");

  //add a simple JScrollPane
  textArea = new JTextArea(10,10);
  JScrollPane scrollPane = new JScrollPane(textArea); 
  textArea.setEditable(true);

  add(scrollPane);

}
//This doesn't print anything when i am clicking in the JFrame
public void mousePressed(MouseEvent e) 
{
    if(e.getButton() == MouseEvent.BUTTON1)
    {
        System.out.println("left");
    }       
    else if(e.getButton() == MouseEvent.BUTTON3)
    {
      System.out.println("right");
    }
}


}