public void cambiarvalores(){

    Integer cv1, cv2, cv3, cv4, cv5;
    cv1=ep1-llevap1;
    cv2=ep2-llevap2;
    cv3=ep3-llevap3;
    cv4=ep4-llevap4;
    cv5=ep5-llevap5;

    e1.setText(cv1.toString());
    e2.setText(cv2.toString());
    e3.setText(cv3.toString());
    e4.setText(cv4.toString());
    e5.setText(cv5.toString());


}

private void btnsiActionPerformed(java.awt.event.ActionEvent evt) {
    ventana.cambiarvalores();
    ventana open=new ventana();
    open.setVisible(true);
    open.setLocationRelativeTo(null);
    dispose();
}