Paint problem

Du boer enten lave en Swing app med en main metode eller en JApplet uden main metode.

Og selv i tilfaelde af applet skal du kun have en klasse som extender JApplet.

Simple example with main:

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class GUI1 extends JFrame {
    private JPanel some;
    private JButton prt;
    public GUI1() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        getContentPane().setLayout(new BorderLayout());
        setTitle("GUI #1");
        some = new Demo1();
        getContentPane().add(some, BorderLayout.CENTER);
        prt = new JButton("Print");
        prt.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(GUI1.this, "Printer ikke");
            }
        });
        getContentPane().add(prt, BorderLayout.SOUTH);
        pack();
    }
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                JFrame f = new GUI1();
                f.setVisible(true);
            }
        });
    }
}

class Demo1 extends JPanel {
    public Demo1() {
        this.setPreferredSize(new Dimension(200,200));
    }
    @Override
    public void paintComponent(Graphics g) {
        g.drawString("Det virker OK !!", 20, 20);
    }
}

Applet eksempel:

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;

public class ModalApplet extends JApplet {
    public void init() {
        setLayout(new BorderLayout());
        getContentPane().add(new JLabel("Test af dialog"), BorderLayout.CENTER);
        JButton btn1 = new JButton("Åben dialog");
        btn1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JDialog dia = new JDialog((Frame)null, "Test", true);
                dia.setLayout(new BorderLayout());
                dia.add(new JLabel("Dette er dialogen"), BorderLayout.CENTER);
                JButton btn3 = new JButton("Test om dialog er aktiv");
                btn3.addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        JOptionPane.showMessageDialog(null, "Dialog er aktiv");
                    }
                });
                dia.add(btn3, BorderLayout.SOUTH);
                dia.setMinimumSize(new Dimension(200, 200));
                dia.setVisible(true);
            }
        });
        getContentPane().add(btn1, BorderLayout.NORTH);
        JButton btn2 = new JButton("Test om applet er aktiv");
        btn2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null, "Applet er aktiv");
            }
        });
        getContentPane().add(btn2, BorderLayout.SOUTH);
       
    }
}

Sorry, forsinkelsen men takker for svaret arne_v

og smid så et svar :D

komme rher