--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/demo/share/jfc/J2Ddemo/java2d/demos/Colors/BullsEye.java Mon May 14 08:58:32 2018 -0700
@@ -0,0 +1,76 @@
+/*
+ *
+ * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of Oracle nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package java2d.demos.Colors;
+
+
+import static java.awt.Color.RED;
+import static java.awt.Color.WHITE;
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.geom.Ellipse2D;
+import java2d.Surface;
+
+
+/**
+ * Creating colors with an alpha value.
+ */
+@SuppressWarnings("serial")
+public class BullsEye extends Surface {
+
+ public BullsEye() {
+ setBackground(WHITE);
+ }
+
+ @Override
+ public void render(int w, int h, Graphics2D g2) {
+
+ Color reds[] = { RED.darker(), RED };
+ for (int N = 0; N < 18; N++) {
+ float i = (N + 2) / 2.0f;
+ float x = (5 + i * (w / 2 / 10));
+ float y = (5 + i * (h / 2 / 10));
+ float ew = (w - 10) - (i * w / 10);
+ float eh = (h - 10) - (i * h / 10);
+ float alpha = (N == 0) ? 0.1f : 1.0f / (19.0f - N);
+ if (N >= 16) {
+ g2.setColor(reds[N - 16]);
+ } else {
+ g2.setColor(new Color(0f, 0f, 0f, alpha));
+ }
+ g2.fill(new Ellipse2D.Float(x, y, ew, eh));
+ }
+ }
+
+ public static void main(String s[]) {
+ createDemoFrame(new BullsEye());
+ }
+}