Java Tutorial 44 (GUI) – Simple Animation

finally someone who talks to me like I was retarded, easy to understand tutorial, gg

It's not working FOR MEEEEEE
WHYYYYYYYYYYYYYYY IT WON'T move!!!

No its Ai will be teaching yuuu

Thank you so much. You're the first person to mention repaint(). I've been looking for almost a week to find that.

How to animate with Colors and Timer?

Thank you ,great explanation

I have a Glitch in the animation , but I Use Ubuntu !! is there any solution Please ??

Simpler way even : https://youtu.be/_NEnhm9mgdE

how come when i write (public class tutorial extends JPanel implements ActionListener) always tell me that i have to make it abstract ? how can i disable it from becoming abstract ??

Your tutotrial is pretty easy to understand !
Thanks!

Thx for the tutorial!

good tutorial, but pplease zoom out a little – need to see the whole thing.

My rectangle is lagging when moving, is it normal ?
Here's the code guys:

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

public class Tutorial extends JPanel implements ActionListener{
Timer tm = new Timer(5, this); // 5 -> milliseconde, this -> ActionListener
int x = 0, velX = 2;
int y = 0, velY = 2;

public Tutorial(){
tm.start();
}

public void paintComponent(Graphics g){
super.paintComponent(g);

g.setColor(Color.RED);
g.fillRect(x, y, 50, 30);

// tm.start(); // not optimal
}

public void actionPerformed(ActionEvent e){
if(x < 0 || x > 550)
velX = -velX;

if(y < 0 || y > 340)
velY = -velY;

y = y + velY;
x = x + velX;
repaint();

}

public static void main(String[] args) {
Tutorial t = new Tutorial();
JFrame jf = new JFrame();
jf.setSize(600, 400);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setResizable(false);
jf.add(t);
}
}

Instead of x = x + velX, you can use x += velX

thanks

2:02

How to add another Rectangle > >? ? Is it possible Adding another Rectangle ??

next time try to make the program from the begining………

Why it not work for me and it still says that the Tutorial is wrong and it has a red underline

good video. 2 tips though.

1 if people don't know what interface implementation means, then they are not ready for animation programming, no need going through what implements means in what is supposed to be an intermediate subject.

2 The way you "moved" the X over in the Y slot and said "just imagine that it is a Y variable", just makes your instructions harder to understand, as well as making your code look less actual implementation of this functionality.
it took you more effort explaining your changes, than just adding the Y and velY would have been.

Good tutorial, but how to add TWO moving rectangles to one JFrame? I tried it, and second rect, is overwritting the first one. I tried using JPanel but it doesn't work 🙁 Or i'm doing something wrong 🙁