Como crio outro eento para outro botao

this.btn_ENTRAR.addActionListener(new ActionListener() {
	@Override
    public void actionPerformed(ActionEvent ac) {	
    	this.frame1.setVisible(false);
    	this.frame2.setVisible(true);		
   	}
});

private JFrame frame1;
	public JButton btn_ENTRAR;
	public JButton btn_SAIR;
	private JFrame frame2;

	public Principal() {
		janelas();

	}

	public void janelas() {
		
		this.frame1 = new JFrame();
		this.frame1.setTitle("Janela 1");
		this.frame1.setPreferredSize(new Dimension(400, 400));
		this.frame1.pack();
		this.frame1.setLayout(null);
		this.frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.frame1.setLocationRelativeTo(null);
		this.frame1.setVisible(true);

		this.frame2 = new JFrame();
		this.frame2.setTitle("Janela 2");
		this.frame2.setPreferredSize(new Dimension(400, 400));
		this.frame2.pack();
		this.frame2.setLayout(null);
		this.frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.frame2.setLocationRelativeTo(null);
		this.frame2.setVisible(false);
		componentes();
	}

	public void componentes() {
		ClassePrimaria p = new ClassePrimaria();
		this.btn_ENTRAR= new JButton("ENTRAR!");
		this.btn_ENTRAR.setBounds(100,100,100,30);
		this.btn_ENTRAR.addActionListener(this);
		this.frame1.add(btn_ENTRAR);
		//
		this.btn_SAIR= new JButton("SAIR!");
		this.btn_SAIR.setBounds(100,100,100,30);
		this.btn_SAIR.addActionListener(p);
		this.frame2.add(btn_SAIR);	
	}

	public static void main(String[] args) {

		new Principal();

	}
	
	public void texte() {
	
	}

	@Override
	public void actionPerformed(ActionEvent chamaJanela2) {	
		this.frame1.setVisible(false);
		this.frame2.setVisible(true);	
		//
	
	}

	public JFrame getFrame1() {
		return frame1;
	}


	public JFrame getFrame2() {
		return frame2;
	}

}

public ClassePrimaria() {
		
		
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		Principal peincipal = new Principal();
		peincipal.getFrame1().setVisible(true);
		peincipal.getFrame2().setVisible(false);
	}

}