Java Code Examples for Color

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Common ways to obtain Color

private void myMethod () {
 Color c =UIManager.getColor("Tree.selectionBackground")
new Color(r, g, b)
String nm;Color.decode(nm)
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}

Color c = new Color(-16726016, true);
 System.out.println(c.getRed());
 System.out.println(c.getGreen());
 System.out.println(c.getBlue());
 System.out.println(c.getAlpha());

private int toColor(int height)
{
  // height seems to be between -2040 and 0, inclusive
  height = -height;
  // Convert to between 0 and 1
  float color = (float) height / MAX_HEIGHT;
  assert color >= 0.0f && color <= 1.0f;
  return new Color(color, color, color).getRGB();
}

/** Convers a color to a string. */
static public String toString (Color color) {
  if (color == null) throw new IllegalArgumentException("color cannot be null.");
  String r = Integer.toHexString(color.getRed());
  if (r.length() == 1) r = "0" + r;
  String g = Integer.toHexString(color.getGreen());
  if (g.length() == 1) g = "0" + g;
  String b = Integer.toHexString(color.getBlue());
  if (b.length() == 1) b = "0" + b;
  return r + g + b;
}

public Color(java.awt.Color awtColor) {
 this(awtColor.getRed(), awtColor.getGreen(), awtColor.getBlue(), awtColor.getAlpha());
}

private JFrame frame = new JFrame("sssssssss");
private JButton tip1Null = new JButton(" test button ");
  ((Graphics2D) g).setRenderingHint(
    RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  g.setColor(color);
  g.drawRoundRect(x, y, width, height, MARGIN, MARGIN);
  final Color color1 = new Color(230, 255, 255, 0);
  final Color color2 = new Color(255, 230, 255, 64);
  final Color alphaColor = new Color(200, 200, 230, 64);
  final Color color3 = new Color(
    alphaColor.getRed(), alphaColor.getGreen(), alphaColor.getBlue(), 0);
  final Color color4 = new Color(
    alphaColor.getRed(), alphaColor.getGreen(), alphaColor.getBlue(), 64);
  super.paint(g, c);
  Graphics2D g2D = (Graphics2D) g;
  g2D.setPaint(gradient1);
  g2D.fill(rec1);
  paintText(g, b, b.getBounds(), b.getText());
  g.setColor(Color.red.brighter());
  g.fillRect(0, 0, b.getSize().width, b.getSize().height);

Graphics2D g2d = (Graphics2D) g.create();
g2d.setColor(new Color(0xFFAA00));
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setStroke(basicStroke);
g2d.drawRoundRect(3, 3, getWidth()-4, getHeight()-4, archH, archH);
setLayout(new GridBagLayout()); 
add(usrNameLabel, labCnst);
add(usrNameFeild, txtCnst);
comp.setFont(getFont().deriveFont(Font.BOLD, 13));
                            new Color[] { new Color(0x002AFF),
                            new Color(0x0CAAF9),
                            new Color(0x0CAAF9),
                            new Color(0x002AFF) });
    JFrame frame = new JFrame("Demo: LogIn Dialogue");
    frame.setSize(new Dimension(500, 300)); 
    MainContainer container = new MainContainer();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);

public void draw (BufferedImage image, Graphics2D g, UnicodeFont unicodeFont, Glyph glyph) {
  g = (Graphics2D)g.create();
  g.translate(xDistance, yDistance);
  g.setColor(new Color(color.getRed(), color.getGreen(), color.getBlue(), Math.round(opacity * 255)));
  g.fill(glyph.getShape());
  // Also shadow the outline, if one exists.
  for (Iterator iter = unicodeFont.getEffects().iterator(); iter.hasNext();) {
    Effect effect = (Effect)iter.next();
    if (effect instanceof OutlineEffect) {
      Composite composite = g.getComposite();
      g.setComposite(AlphaComposite.Src); // Prevent shadow and outline shadow alpha from combining.
      g.setStroke(((OutlineEffect)effect).getStroke());
      g.draw(glyph.getShape());
      g.setComposite(composite);
      break;
    }
  }
  g.dispose();
  if (blurKernelSize > 1 && blurKernelSize < NUM_KERNELS && blurPasses > 0) blur(image);
}

private int padding = 25;
private int labelPadding = 25;
private Color lineColor = new Color(44, 102, 230, 180);
private Color pointColor = new Color(100, 100, 100, 180);
private Color gridColor = new Color(200, 200, 200, 200);
private static final Stroke GRAPH_STROKE = new BasicStroke(2f);
private int pointWidth = 4;
  super.paintComponent(g);
  Graphics2D g2 = (Graphics2D) g;
  g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  double xScale = ((double) getWidth() - (2 * padding) - labelPadding) / (scores.size() - 1);
  double yScale = ((double) getHeight() - 2 * padding - labelPadding) / (getMaxScore() - getMinScore());
  g2.setColor(Color.WHITE);
  g2.fillRect(padding + labelPadding, padding, getWidth() - (2 * padding) - labelPadding, getHeight() - 2 * padding - labelPadding);
  g2.setColor(Color.BLACK);
      g2.drawString(yLabel, x0 - labelWidth - 5, y0 + (metrics.getHeight() / 2) - 3);
        g2.drawString(xLabel, x0 - labelWidth / 2, y0 + metrics.getHeight() + 3);
  invalidate();
  this.repaint();

+ "The effect we want is a multi-line label.";
JFrame f = new JFrame("Label Render Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
textLabel.setSize(textLabel.getPreferredSize());
Dimension d = textLabel.getPreferredSize();
BufferedImage bi = new BufferedImage(
  d.width,
  BufferedImage.TYPE_INT_ARGB);
Graphics g = bi.createGraphics();
g.setColor(new Color(255, 255, 255, 128));
g.fillRoundRect(
  0,
  0,
JLabel imageLabel = new JLabel(ii);
f.getContentPane().add(imageLabel);
f.pack();
f.setLocationByPlatform(true);
f.setVisible(true);

private static final int BORDER_GAP = 30;
private static final Color GRAPH_COLOR = Color.green;
private static final Color GRAPH_POINT_COLOR = new Color(150, 50, 50, 180);
private static final Stroke GRAPH_STROKE = new BasicStroke(3f);
private static final int GRAPH_POINT_WIDTH = 12;
 super.paintComponent(g);
 Graphics2D g2 = (Graphics2D)g;
 g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 double xScale = ((double) getWidth() - 2 * BORDER_GAP) / (scores.size() - 1);
 double yScale = ((double) getHeight() - 2 * BORDER_GAP) / (MAX_SCORE - 1);
 g2.drawLine(BORDER_GAP, getHeight() - BORDER_GAP, BORDER_GAP, BORDER_GAP);
 g2.drawLine(BORDER_GAP, getHeight() - BORDER_GAP, getWidth() - BORDER_GAP, getHeight() - BORDER_GAP);
   int y0 = getHeight() - (((i + 1) * (getHeight() - BORDER_GAP * 2)) / Y_HATCH_CNT + BORDER_GAP);
   int y1 = y0;
   g2.drawLine(x0, y0, x1, y1);
 Stroke oldStroke = g2.getStroke();
 g2.setColor(GRAPH_COLOR);
 g2.setStroke(GRAPH_STROKE);
 for (int i = 0; i < graphPoints.size() - 1; i++) {
   int x1 = graphPoints.get(i).x;

  private void renderPoly(Graphics2D graphics, Color color, Polygon polygon)
  {
    if (polygon != null)
    {
      graphics.setColor(color);
      graphics.setStroke(new BasicStroke(2));
      graphics.draw(polygon);
      graphics.setColor(new Color(color.getRed(), color.getGreen(), color.getBlue(), 20));
      graphics.fill(polygon);
    }
  }
}

  this.setPreferredSize(new Dimension(W, H));
  timer.start();
  JFrame f = new JFrame();
  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  f.setBackground(new Color(0f, 0f, 0f, 0.3f));
  f.setUndecorated(true);
  f.add(new Translucent());
  f.pack();
  f.setLocationRelativeTo(null);
  f.setVisible(true);
public void actionPerformed(ActionEvent e) {
  now.setTime(System.currentTimeMillis());
  this.repaint();

private void drawTextInImg(BufferedImage baseImage, String textToWrite, int x, int y) {
  Graphics2D g2D = (Graphics2D) baseImage.getGraphics();
  g2D.setColor(new Color(167, 136, 69));
  //TODO 注意，这里的字体必须安装在服务器上
  g2D.setFont(new Font("Microsoft YaHei", Font.PLAIN, 28));
  g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  g2D.drawString(textToWrite, x, y);
  g2D.dispose();
}

final BufferedImage dietered = floydSteinbergDithering(ImageIO.read(new URL("http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png"))).getSubimage(100, 100, 300, 300);
JFrame frame = new JFrame("Test");
frame.setLayout(new GridLayout(1, 2));
frame.add(new JComponent() {
 @Override
 protected void paintComponent(Graphics g) {
 Color color = new Color(c);
 this.r = color.getRed();
 this.g = color.getGreen();
 this.b = color.getBlue();
 return new Color(clamp(r), clamp(g), clamp(b));

constraints.fill = GridBagConstraints.BOTH;
JLabel l = new JLabel("You have got 2 new Messages.");
panel.add(l, constraints);
constraints.gridx++;
constraints.weightx = 0f;
    dialog.dispose();
    new float[]{0f, 0.3f, 1f}, new Color[]{new Color(0.8f, 0.8f, 1f),
      new Color(0.7f, 0.7f, 1f), new Color(0.6f, 0.6f, 1f)});
dialog.setContentPane(panel);
dialog.setVisible(true);
  setOpaque(true);
protected void paintComponent(final Graphics g) {
  final Graphics2D g2d = (Graphics2D) g;
  g2d.setPaint(lpg);
  g2d.fillRect(1, 1, getWidth() - 2, getHeight() - 2);
  g2d.setColor(Color.BLACK);
  g2d.drawRect(0, 0, getWidth() - 1, getHeight() - 1);

repaint();
repaint();
super.paintComponent(g);
for (Line line : lines) {
  g.setColor(line.color);
  g.drawLine(line.x1, line.y1, line.x2, line.y2);
    int y1 = (int) (Math.random()*200);
    int y2 = (int) (Math.random()*200);
    Color randomColor = new Color((float)Math.random(), (float)Math.random(), (float)Math.random());
    comp.addLine(x1, y1, x2, y2, randomColor);
testFrame.pack();
testFrame.setVisible(true);

      "<div style='width: 100%; height: 100%; " +
      "background-color: #" +
      Integer.toHexString(color.getRed()) +
      Integer.toHexString(color.getGreen()) +
      Integer.toHexString(color.getBlue()) +
      ";'>" +
      value.toString() +
ta.setFocusable(false);
return ta;
JPanel fontTable = new JPanel(new BorderLayout(3, 1));
fontTable.setFocusable(true);
JPanel fontNameCol = new JPanel(new GridLayout(0, 1, 2, 2));
JPanel fontExampleCol = new JPanel(new GridLayout(0, 1, 2, 2));
fontTable.add(fontNameCol, BorderLayout.WEST);
fontTable.add(fontExampleCol, BorderLayout.CENTER);
for (int ii = 0; ii < fonts.length; ii++) {
  fontNameCol.add(new JLabel(fonts[ii]));

protected void paintComponent(Graphics g) {
  if (getModel().isPressed()) {
    g.setColor(pressedBackgroundColor);
  } else if (getModel().isRollover()) {
    g.setColor(hoverBackgroundColor);
  } else {
    g.setColor(getBackground());
  g.fillRect(0, 0, getWidth(), getHeight());
  super.paintComponent(g);
JFrame frame = new JFrame("Test button");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final MyButton btnSave = new MyButton("Save");
btnSave.setForeground(new Color(0, 135, 200).brighter());
btnSave.setHorizontalTextPosition(SwingConstants.CENTER);
btnSave.setBorder(null);
btnSave.setBackground(new Color(3, 59, 90));
btnSave.setHoverBackgroundColor(new Color(3, 59, 90).brighter());
btnSave.setPressedBackgroundColor(Color.PINK);
frame.add(btnSave);
frame.setSize(200, 200);
frame.setVisible(true);

  JFrame f = new JFrame();
  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  jtp.setPreferredSize(new Dimension(400, 200));
  createTab("Reds", Color.RED);
  createTab("Greens", Color.GREEN);
  createTab("Blues", Color.BLUE);
  f.add(jtp, BorderLayout.CENTER);
  f.pack();
  f.setVisible(true);
this.parent = parent;
this.icon = icon;
this.mask = icon.color.getRGB();
this.setBackground(icon.color);
label.setForeground(icon.color);
this.add(label);
timer.start();
this.setBackground(new Color(rnd.nextInt() & mask));
this.icon.update(count += rnd.nextInt(8));
this.parent.repaint();
g.setColor(color);
g.fillRect(x, y, w, H);

 window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 window.setLocationByPlatform(true);
 window.setVisible(true);
private Color pInterfaceColour = new Color(255, 245, 62);
protected int iDegreeWhite = 180;
protected int iDegreeBlack = 0;
 setSize(iWidth, iHeight);
 getContentPane().setBackground(pInterfaceColour);
 pGradientPane = new JPanel() {
   private static final long serialVersionUID = 1L;
    pGraphicsGradientRender.setRenderingHint(
       RenderingHints.KEY_ANTIALIASING,
       RenderingHints.VALUE_ANTIALIAS_ON);
    GradientPaint pGradient = new GradientPaint(0, 0, new Color(255,
       255, 255, iDegreeWhite), 0, getHeight(), new Color(0, 0, 0,
       iDegreeBlack));
    pGraphicsGradientRender.setPaint(pGradient);
    pGraphicsGradientRender.fillRect(0, 0, getWidth(), getHeight());
    super.paintComponent(pGraphics);
 pGradientPane.setPreferredSize(new Dimension(iWidth - 16, iHeight - 62));
 add(pGradientPane);

Javadoc

The Color class is used to encapsulate colors in the default sRGB color space or colors in arbitrary color spaces identified by a ColorSpace. Every color has an implicit alpha value of 1.0 or an explicit one provided in the constructor. The alpha value defines the transparency of a color and can be represented by a float value in the range 0.0 - 1.0 or 0 - 255. An alpha value of 1.0 or 255 means that the color is completely opaque and an alpha value of 0 or 0.0 means that the color is completely transparent. When constructing a Color with an explicit alpha or getting the color/alpha components of a Color, the color components are never premultiplied by the alpha component.

The default color space for the Java 2D(tm) API is sRGB, a proposed standard RGB color space. For further information on sRGB, see http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html .

Most used methods

<init>
getRed
Returns the red component in the range 0-255 in the default sRGB space.
getBlue
Returns the blue component in the range 0-255 in the default sRGB space.
getGreen
Returns the green component in the range 0-255 in the default sRGB space.
getRGB
Returns the RGB value representing the color in the default sRGB ColorModel. (Bits 24-31 are alpha,
getAlpha
equals
Determines whether another object is equal to thisColor. The result is true if and only if the argum
darker
Creates a new Color that is a darker version of thisColor. This method applies an arbitrary scale fa
decode
Converts a String to an integer and returns the specified opaque Color. This method handles string f
brighter
Creates a new Color that is a brighter version of thisColor. This method applies an arbitrary scale
RGBtoHSB
Converts the components of a color, as specified by the default RGB model, to an equivalent set of v
getHSBColor
Creates a Color object based on the specified values for the HSB color model. The s and b component

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How to useColor in java.awt

Best Java code snippets using java.awt.Color (Showing top 20 results out of 17,343)

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