Examples of java.awt.Graphics.clearRect()

java.awt.Graphics.clearRect()
Clears the specified rectangle by filling it with the background color of the current drawing surface. This operation does not use the current paint mode.
Beginning with Java 1.1, the background color of offscreen images may be system dependent. Applications should use setColor followed by fillRect to ensure that an offscreen image is cleared to a specific color. @param x the x coordinate of the rectangle to clear. @param y the y coordinate of the rectangle to clear. @param width the width of the rectangle to clear. @param height the height of the rectangle to clear. @see java.awt.Graphics#fillRect(int,int,int,int) @see java.awt.Graphics#drawRect @see java.awt.Graphics#setColor(java.awt.Color) @see java.awt.Graphics#setPaintMode @see java.awt.Graphics#setXORMode(java.awt.Color)

            } else {
                externalFrame.setSize(200, 200);
            }
            
            Graphics g = externalFrame.getGraphics();
            g.clearRect(0, 0, 200, 200);
            externalFrame.paint(g);
            g.translate(externalFrame.getInsets().left, externalFrame.getInsets().top);
            ((Graphics2D)g).setTransform(((Graphics2D)originalGraphics).getTransform());
            
            g.setColor(originalGraphics.getColor());

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    public void initContents() {
        // images with forced acceleration type may have a null sdCurrent
        // because we do not create a backup surface for them
        if (sdCurrent != null) {
            Graphics g = vImg.createGraphics();
            g.clearRect(0, 0, vImg.getWidth(), vImg.getHeight());
            g.dispose();
        }
    }


    /**

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            } else {
                externalFrame.setSize(200, 200);
            }
            
            Graphics g = externalFrame.getGraphics();
            g.clearRect(0, 0, 200, 200);
            externalFrame.paint(g);
            g.translate(externalFrame.getInsets().left, externalFrame.getInsets().top);
            ((Graphics2D)g).setTransform(((Graphics2D)originalGraphics).getTransform());
            
            g.setColor(originalGraphics.getColor());

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            double h = sizey.getValue() / 100.0;
            double a = angle.getValue() / 1000.0;


            Graphics g = psf.createGraphics();


            g.clearRect(0, 0, width, height);
            g.dispose();


            left.drawDot(w, h, a);
        }
    }

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    }


    private void doclear() {
        Graphics g = psf.createGraphics();


        g.clearRect(0, 0, width, height);
        g.dispose();
        left.repaint();
        recalc();
    }

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           bufferImage == null )
        resetBuffer();


      Graphics bufferGraphics = bufferImage.getGraphics();
      // Clear the offscreen image
      bufferGraphics.clearRect( 0, 0, bufferWidth, bufferHeight );


      if ( text != null )
        renderer.paintText( this, bufferGraphics, text );


      // Copy offscreen image onto the onscreen image

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                        g.setClip(ra.paintRects[i]);
                        if (i == UPDATE) {
                            updateComponent(comp, g);
                        } else {
                            if (shouldClearRectBeforePaint) {
                                g.clearRect( ra.paintRects[i].x,
                                             ra.paintRects[i].y,
                                             ra.paintRects[i].width,
                                             ra.paintRects[i].height);
                            }
                            paintComponent(comp, g);

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    // g.fillRect(0, 0, getWidth(), getHeight());
  }


  public void clearCanvas() {
    Graphics g = getGraphics();
    g.clearRect(0, 0, g.getClipBounds(getVisibleRect()).width,
        g.getClipBounds(getVisibleRect()).height);
    setbkg(Color.RED);
  }


  public void setbkg(Color color) {

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                        if (buffer == null) {
                            buffer = this.createImage(clientwidth, clientheight);
                        }


                        Graphics bg = buffer.getGraphics();
                        bg.clearRect(0, 0, clientwidth - 1, clientheight - 1);
                        bg.setClip(0, 0, clientwidth, clientheight);
                        bg.setColor(Consts.BACKGROUND);
                        rePaint(bg);
                        g.drawImage(buffer, 0, 0, null);
                        bg.dispose();

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