public class PrologPlusCG {
// Construct the application
public PrologPlusCG() {
PPCGEnv env = new PPCGEnv();
PrologPlusCGFrame frame = new PrologPlusCGFrame(env, false);
PPCGIO_GUI io = new PPCGIO_GUI(env, frame);
env.io = io;
frame.validate();
//Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
}