CODEWITHSUNDEEP
javagraphics
Paldan
Paldan

Reputation: 435

Clear all graphics from screen Java

I'm working on a small game and I want to set the condition for defeat. If defeat is true, I want all the graphics on the screen to be cleared so I can make way for some output text on the screen.

I would assume there is a conventional way to do this (which I would rather know than having to put in unnecessary code). Thanks in advance!

Here is my code so far:

public void paintComponent(Graphics g){
        if (!defeat){
            super.paintComponent(g);
            square.display(g);
            wall.display(g);
            for (Circle circle: circleArray){

                circle.display(g);
            }

        }else if(defeat){

            g.drawString("You have been defeated", 300, 300);
        }

Upvotes: 2

Views: 5937

Answers (2)

Lee Fogg
Lee Fogg

Reputation: 795

"I want all the graphics on the screen to be cleared so I can make way for some output text on the screen", but you also want the screen to be cleared every frame, so you basically need to always clear it, meaning you should put super.paintComponent(g); outside any if statements.
I'd recommend this code: (I've cleaned it up and moved the frame clear)

public void paintComponent(Graphics g){
    super.paintComponent(g);
    if (defeat){
        g.drawString("You have been defeated", 300, 300);
    } else {
        square.display(g);
        wall.display(g);
        for (Circle circle: circleArray)
            circle.display(g);
    }
}

I'd also recommend changing the variable defeat to defeated and giving the Graphics object a better name, like I use canvas.

Upvotes: 0

Simon Forsberg
Simon Forsberg

Reputation: 13331

You should always call super.paintComponent(g); (unless you really know what you are doing).

Put that call outside your if-statement. That call is what "clears the screen". Like this:

public void paintComponent(Graphics g){
    super.paintComponent(g);
    if (!defeat){
        square.display(g);
        wall.display(g);
        for (Circle circle: circleArray){

            circle.display(g);
        }

    }else if(defeat){

        g.drawString("You have been defeated", 300, 300);
    }

Upvotes: 5

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