class createNewWindows extends Frame{
	public createNewWindows(String pTitle, Integer pX, Integer pY, Integer pwidth, Integer pHeight){
		super(pTitle);
		this.setBounds(pX, pY, pwidth, pHeight);
		this.setLocationRelativeTo(null);
		this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);		this.setVisible(true);
	}
}

alex@shellroot:~/Escritorio$ javac PoC.java
PoC.java:23: cannot find symbol
symbol  : variable EXIT_ON_CLOSE
location: class createNewWindows
		this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
		                                  ^
1 error

class createNewWindows extends Frame{
	public createNewWindows(String pTitle, Integer pX, Integer pY, Integer pwidth, Integer pHeight){
		super(pTitle);
		this.setBounds(pX, pY, pwidth, pHeight);
		this.setLocationRelativeTo(null);
		this.setBackground(Color.black);
		this.setForeground(Color.white);
		this.addWindowListener(new WindowListener(){
			public void windowActivated(WindowEvent e){}
			public void windowClosed(WindowEvent e){}
			public void windowDeactivated(WindowEvent e){}
			public void windowDeiconified(WindowEvent e){}
			public void windowIconified(WindowEvent e){}
			public void windowOpened(WindowEvent e){}
			public void windowClosing(WindowEvent e){e.getWindow().dispose();}
		});
		this.setVisible(true);
	}
}

label1.setFont(new java.awt.Font("Arial", 0, 30));