Keskustelu: Ohjelmointikysymykset: Java: Virheilmoituksia

javac "kaksi.java" (kansiossa /home/elias/Ohjelmointi/Java/testi)
kaksi.java:4: warning: The serializable class kaksi does not declare a static final serialVersionUID field of type long
	public class kaksi extends JFrame {
	             ^^^^^
kaksi.java:6: warning: The field kaksi.plFont is never read locally
	private Font plFont;
	             ^^^^^^
kaksi.java:7: warning: The field kaksi.itFont is never read locally
	private Font itFont;
	             ^^^^^^
kaksi.java:8: warning: The field kaksi.boFont is never read locally
	private Font boFont;
	             ^^^^^^
kaksi.java:9: warning: The field kaksi.ibFont is never read locally
	private Font ibFont;
	             ^^^^^^
kaksi.java:36: error: plfont cannot be resolved
	plfont = new Font("Serif", Font.PLAIN, 20);
	^^^^^^
kaksi.java:37: error: itfont cannot be resolved
	itfont = new Font("Serif", Font.ITALIC, 20);
	^^^^^^
kaksi.java:38: error: bofont cannot be resolved
	bofont = new Font("Serif", Font.BOLD, 20);
	^^^^^^
kaksi.java:39: error: ibfont cannot be resolved
	ibfont = new Font("Serif", Font.ITALIC + Font.BOLD, 20);
	^^^^^^
kaksi.java:40: error: plfont cannot be resolved
Käännös epäonnistui.
	tfield.setFont(plfont);
	               ^^^^^^
10 problems (5 errors, 5 warnings)

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class kaksi extends JFrame {
	private JTextField tfield;
	private Font plFont;
	private Font itFont;
	private Font boFont;
	private Font ibFont;
	private JRadioButton pbutton;
	private JRadioButton ibutton;
	private JRadioButton bbutton;
	private JRadioButton ibbutton;
	private ButtonGroup group;

	public kaksi() {
		super("Radio Novaaa :D");
		setLayout(new FlowLayout());

		tfield = new JTextField(20);
		add(tfield);
		pbutton = new JRadioButton("Plain", true);
		ibutton = new JRadioButton("Italic", false);
		bbutton = new JRadioButton("Bold", false);
		ibbutton = new JRadioButton("Italic and Bold", false);
		add(pbutton);
		add(ibutton);
		add(bbutton);
		add(ibbutton);
		group = new ButtonGroup();
		group.add(pbutton);
		group.add(ibutton);
		group.add(bbutton);
		group.add(ibbutton);

		plfont = new Font("Serif", Font.PLAIN, 20);
		itfont = new Font("Serif", Font.ITALIC, 20);
		bofont = new Font("Serif", Font.BOLD, 20);
		ibfont = new Font("Serif", Font.ITALIC + Font.BOLD, 20);
		tfield.setFont(plfont);
	}
}