Basically I need to do this for school, Ive been through all kinds of posts about this and everyone just says "why'd you wanna do that?" and don't answer. So a lot of people need help on this and your answer could get a lot of likes someday
So here's my class - what couple lines of code do i need to add to main to make this JApplet
pop up and draw the bricks into a JApplet
window?
public class Wall extends JApplet {
ArrayList<Brick> bricks = new ArrayList<Brick>();
Color[] colors = {Color.decode("#1abc9c"), Color.decode("#f1c40f"), Color.decode("#d35400"), Color.decode("#e74c3c"), Color.decode("#2ecc71"), Color.decode("#3498db"), Color.decode("#9b59b6"), Color.decode("#34495e")};
ArrayList<Integer> usedInts = new ArrayList<Integer>();
public void makeBricks(){
int xPos = 20;
int yPos = 50;
int height = 50;
int width = 60;
for(int i=0; i<8;i++){
Brick b = new Brick();
b.setxPosition(xPos);
xPos =+60;
b.setyPosition(yPos);
if (xPos == 200){
yPos+=50;
}
b.setColor(randomColor());
b.setHeight(height);
b.setWidth(width);
bricks.add(b);
}
}
public Color randomColor(){
Random r = new Random(System.currentTimeMillis());
boolean allAssigned = false;
while(!allAssigned){
int newInt = r.nextInt(8);
if(!usedInts.contains(newInt)){
usedInts.add(newInt);
return colors[newInt];
}
if(usedInts.size()>7){
usedInts.clear();
}
}
return Color.BLACK;
}
public void draw(Graphics g) {
for(Brick b: bricks){
b.draw(g);
}
}
@Override
public void paint(Graphics g){
draw(g);
}
public static void main(String[] args) {
//these lines do not work
Wall wall = new Wall();
wall.makeBricks();
wall.draw();
}
}
JApplet
's don't have a window of their own, they are embedded within a web page by a browser. It's possible to use the applet viewer to display them, but you'd need to do that from the command line
Start by creating a custom class the extends from something like JPanel
, override it's paintComponent
and perform you custom painting there. See Performing Custom Painting for more details.
In your main
method, create a new JFrame
and add your "game panel" to it...
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new GamePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
If you MUST have a applet, you can now add the "game panel" to it as well
See How to Make Frames (Main Windows) and Using Top-Level Containers for more details
As mentioned by others, applets don't normally have a standalone window. On the other hand, there are at least 3 ways in which an applet can be included in a free floating window:
main(String[])
that creates a wrapper frame for the applet and calls the init()
method etc. This is handy for testing simpler (no parameters etc.) applets where the security sand-box just gets in the way. I also had a site where I provided Appleteer, similar to applet viewer except it would launch multiple applets in a single HTML document, whereas the applet viewer would split them into separate free floating windows (and other slight differences - Appleteer had no security sandbox..). Unfortunately my free hosting for the sites stopped running the web hosting side of the business!
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