code: private void initialize() {
          this.setDefaultCloseOperation(javax.swing.JFrame.DO_NOTHING_ON_CLOSE);
          this.setContentPane(getJPanel());
         	this.setPreferredSize(new Dimension(550, 375));
          this.addWindowListener(new java.awt.event.WindowAdapter() {
  
          	@Override
  			public void windowClosing(java.awt.event.WindowEvent e) {
  
          	    btnDecline.doClick();
          	}
          });
  
          showLicense();
  	}
docs: This method initializes this