Examples of java.awt.Graphics.dispose()

java.awt.Graphics.dispose()
Disposes of this graphics context and releases any system resources that it is using. A Graphics object cannot be used after disposehas been called.
When a Java program runs, a large number of Graphics objects can be created within a short time frame. Although the finalization process of the garbage collector also disposes of the same system resources, it is preferable to manually free the associated resources by calling this method rather than to rely on a finalization process which may not run to completion for a long period of time.
Graphics objects which are provided as arguments to the paint and update methods of components are automatically released by the system when those methods return. For efficiency, programmers should call dispose when finished using a Graphics object only if it was created directly from a component or another Graphics object. @see java.awt.Graphics#finalize @see java.awt.Component#paint @see java.awt.Component#update @see java.awt.Component#getGraphics @see java.awt.Graphics#create


        // Create a grayscale image
        BufferedImage grayImage = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
        Graphics g = grayImage.getGraphics();
        g.drawImage(image, 0, 0, null);
        g.dispose();
        PDImageXObject ximage2 = LosslessFactory.createFromImage(document, grayImage);
        validate(ximage2, 8, grayImage.getWidth(), grayImage.getHeight(), "png", PDDeviceGray.INSTANCE.getName());
        checkIdent(grayImage, ximage2.getImage());


        // Create a bitonal image

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        public Raster getLuminosityRaster()
        {
            BufferedImage gray = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
            Graphics g = gray.getGraphics();
            g.drawImage(image, 0, 0, null);
            g.dispose();


            return gray.getRaster();
        }
    }
}

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            graphics.setColor(Color.BLACK);
            graphics.fillRect(0, 0, maxWidth, maxHeight);
        }
        graphics.setColor(Color.WHITE);
        graphics.fillRect(0, 0, minWidth, minHeight);
        graphics.dispose();
        return bim3;
    }


    /**
     * Get the difference between two images, identical colors are set to white,

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    offG.setClip(0, 0, getSize().width, getSize().height);


    super.paint(offG);
    g.drawImage(offScr, 0, 0, null);


    offG.dispose();
  }
}

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    offG.setClip(0, 0, getSize().width, getSize().height);


    super.paint(offG);
    g.drawImage(offScr, 0, 0, null);


    offG.dispose();
  }
}

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            g2.setColor(Color.WHITE);
            g2.drawRect(2 * CELL, 9 * CELL, 8 * CELL, 4 * CELL);
            g2.drawString("GAME OVER! SCORE: " + score, (WIDTH_C - 6) * CELL / 2 + 2,
                (HEIGHT_C + 2) * CELL / 2);
        }
        g2.dispose();
        g.drawImage(img, 0, 0, this);
    }


    private void rot(int i) {
        int t = (bi + i) % 4;

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            case END_MODE: {
                paintEnd(g);
                break;
            }
        }
        g.dispose();
        gr.drawImage(iBuff, 0, 0, this);
    }


    public void update(Graphics g) {
        paint(g);

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    Rectangle local = SwingUtilities.getLocalBounds(jpar);
    Rectangle pub = SwingUtilities.convertRectangle(jpar, local, designer);
    Graphics clipg = g.create(pub.x, pub.y, pub.width + 1, pub.height + 1);
    IPainter painter = (IPainter) focused.getAdapter(IPainter.class);
    painter.paintGrid(clipg);
    clipg.dispose();
  }


  private void paintAdapterAnchor(Graphics g, CompositeAdapter selected) {
    Component jpar = selected.getWidget();
    if (selected.isRoot())

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    Rectangle local = SwingUtilities.getLocalBounds(jpar);
    Rectangle pub = SwingUtilities.convertRectangle(jpar, local, designer);
    Graphics clipg = g.create(pub.x, pub.y, pub.width + 1, pub.height + 1);
    IPainter painter = (IPainter) selected.getAdapter(IPainter.class);
    painter.paintAnchor(clipg);
    clipg.dispose();
  }


  private void paintContextCustomizer(Graphics g, JComponent c) {
    Component root = designer.getRoot();
    if (root != null) {

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    if (root != null) {
      Rectangle rect = new Rectangle(0, 0, root.getWidth(), root.getHeight());
      rect = SwingUtilities.convertRectangle(root, rect, c);
      Graphics clipg = g.create(rect.x - ad, rect.y - ad, rect.width + 2 * ad, rect.height + 2 * ad);
      tranverse(clipg, root, trans, ad);
      clipg.dispose();
      tranverseMenuElement(g, trans, ad);
    }
  }


  private void tranverseMenuElement(Graphics g, Tranverse trans, int ad) {

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