How to "delete" an image from the screen

Question

In this code I would like to delete the image I put before and not one on top of the other.

    Graphics g = getGraphics();
    Graphics bbg = backBuffer.getGraphics();

    bbg.drawImage(fundo.getImage(), 0, 0, this);

    for(int i = 0; i <= 1; i++)
    {
        ImageIcon playerMoving = new ImageIcon("Imagens/andando-" + i + ".png");

        bbg.drawImage(playerMoving.getImage(), 0, 400, this);
    }

    g.drawImage(backBuffer, 0, 0, this);

Answer 1

Try it this way:

g.clearRect(x, y, width, height);

Clears the specified rectangle by filling it with the background color of the current drawing surface. This operation does not use painting mode current.

Starting with Java 1.1, the background color of Offscreen images can depend on the system. Applications must use setColor followed of fillRect to ensure that an off-screen image is cleaned for a specific color.

Click here for documentation!

[UPDATING]

In this code above, this will work because it is painting the same canvas within a for.

There are several ways to accomplish this animation!

Follow an example using the repaint() of a JComponent through a Thread:

import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.ImageObserver;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class Animation extends JComponent implements Runnable, ImageObserver {
    private static final long serialVersionUID = 333L;
    /**
     * Controla/Conta qual frame está sendo exibido
     */
    public int frame = 0;
    /**
     * Entre as animações
     */
    public int delay = 99;
    /**
     * Sequencia de imagem que vamos exibir
     */
    Image[] split = new Image[5];
    /**
     * Responsável por redesenhar a tela!
     */
    Thread animatorThread;
    /**
     * Inicializando as sequencia de imagens e Thread que realiza o controle
     */
    public void init() {
        split[0] = Toolkit.getDefaultToolkit().getImage("0.png");
        split[1] = Toolkit.getDefaultToolkit().getImage("1.png");
        split[2] = Toolkit.getDefaultToolkit().getImage("2.png");
        split[3] = Toolkit.getDefaultToolkit().getImage("3.png");
        split[4] = Toolkit.getDefaultToolkit().getImage("4.png");
        animatorThread = new Thread(this);
        animatorThread.start();
    }
    public void run() {
        while (frame != 999) {
            /**
             * Re pinta a tela 
             */
            repaint();
            frame++;
            try {
                Thread.sleep(delay);
            } catch (final InterruptedException e) {
                e.printStackTrace();
                break;
            }
        }
    }

    public void paint(final Graphics g) {
        /**
         * Utilizamos o resto da divisão por cinco para pegar a posição
         */
        int i = frame % 5;
        // e printa a imagem
        g.drawImage(split[i], 10, 10, this);
    }

    public static class Graphics2DDrawImage {
        public static void main(String[] a) {
            JFrame window = new JFrame();
            window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            window.setBounds(30, 30, 300, 300);
            final Animation animation = new Animation();
            window.getContentPane().add(animation);
            window.setVisible(true);
            animation.init();
        }
    }
}