java满天星系列之(四)动态星星结合…
2016-01-21 10:21
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原文地址http://blog.csdn.net/monitor1394/article/details/6222209
package org.gui;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UIManager;
public class StarShine extends JComponent{
private List stars=new
LinkedList();
private static Random
random=new Random();
private static Color[][]
colors={
{Color.WHITE, Color.BLACK},
{Color.WHITE, Color.BLUE},
{Color.ORANGE, Color.PINK},
{Color.ORANGE, Color.green}
};
private String
menInfo="";
public StarShine(){
setBackground(Color.WHITE);
//每秒输出内存信息
new Timer(500, new ActionListener() {
public
void actionPerformed(ActionEvent evt) {
//随机多边形
int centerX
=random.nextInt(getWidth());
int centerY
=random.nextInt(getHeight());
double innerSize = 1 + (25 *
Math.random());
double outerSize = innerSize
+ 10 + (15 * Math.random());
int numPoints = (int)(8 *
Math.random() + 5);
stars.add(getStar(centerX,centerY,innerSize,outerSize,numPoints));
//内存信息
long
tm=Runtime.getRuntime().totalMemory();
long
mm=Runtime.getRuntime().maxMemory();
long
fm=Runtime.getRuntime().freeMemory();
long um=tm-fm;
menInfo=String.format("%d /
%d MB %d",
um/(1024*1024),mm/(1024*1024),stars.size());
repaint();
}
}).start();
}
@Override
protected void
paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D)g;
//天空背景
GradientPaint background = new GradientPaint(0f,
0f, Color.GRAY.darker(),
0f, (float)getHeight(),
Color.GRAY.brighter());
g2d.setPaint(background);
g2d.fillRect(0, 0, getWidth(), 4*getHeight()/5);
//地面背景
background = new GradientPaint(0f,
(float)4*getHeight()/5,
Color.BLACK,
0f, (float)getHeight(),
Color.GRAY.darker());
g2d.setPaint(background);
g2d.fillRect(0, 4*getHeight()/5, getWidth(),
getHeight()/5);
//开启抗锯齿
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
//画所有的星星
for (Shape star : stars) {
Rectangle
rect = star.getBounds();
Point2D
center = new Point2D.Float(
rect.x + (float)rect.width / 2.0f,
rect.y + (float)rect.height / 2.0f);
float
radius = (float)rect.width / 2.0f;
float[]
dist = {0.1f, 0.9f};
//圆形辐射颜色渐变模式
RadialGradientPaint paint = new RadialGradientPaint(center, radius,
dist, colors[random.nextInt(colors.length)]);
g2d.setPaint(paint);
g2d.fill(star);
}
g2d.drawString(menInfo,10, 10);
}
private static Shape
getStar(double x, double y,
double
innerRadius, double outerRadius,int pointsCount) {
GeneralPath path = new GeneralPath();
double outerAngleIncrement = 2 * Math.PI /
pointsCount;
double outerAngle = 0.0;
double innerAngle = outerAngleIncrement / 2.0;
x += outerRadius;
y += outerRadius;
float x1 = (float) (Math.cos(outerAngle) *
outerRadius + x);
float y1 = (float) (Math.sin(outerAngle) *
outerRadius + y);
float x2 = (float) (Math.cos(innerAngle) *
innerRadius + x);
float y2 = (float) (Math.sin(innerAngle) *
innerRadius + y);
path.moveTo(x1, y1);
path.lineTo(x2, y2);
outerAngle += outerAngleIncrement;
innerAngle += outerAngleIncrement;
for (int i = 1; i < pointsCount; i++) {
x1 =
(float) (Math.cos(outerAngle) * outerRadius + x);
y1 =
(float) (Math.sin(outerAngle) * outerRadius + y);
path.lineTo(x1, y1);
x2 =
(float) (Math.cos(innerAngle) * innerRadius + x);
y2 =
(float) (Math.sin(innerAngle) * innerRadius + y);
path.lineTo(x2, y2);
outerAngle
+= outerAngleIncrement;
innerAngle
+= outerAngleIncrement;
}
path.closePath();
return path;
}
private static void
createAndShowGUI() {
final JFrame f = new JFrame("Star Shine");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(800, 500);
f.add(new StarShine());
f.setVisible(true);
f.setLocationRelativeTo(f.getOwner());
}
public static void
main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
public
void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
}
createAndShowGUI();
}
});
}
}
看效果:
好了
满天星效果简单实例实现完毕
有问题发我邮箱
1360461332@qq.com
我的更多文章:
java满天星系列之(四)动态星星结合内存效果 泽0715 新浪博客
(2016-01-12 11:23:41)
java满天星系列之(三)JFrame实现满天星一闪一闪动态效果 泽0715 新浪博客
(2016-01-11 09:46:20)
java满天星系列之(二)JFrame实现满天星效果 泽0715 新浪博客
(2016-01-10 17:45:59)
java满天星系列之(一)Frame实现满天星效果 泽0715 新浪博客
(2016-01-07 11:11:06)
原文地址http://blog.csdn.net/monitor1394/article/details/6222209
package org.gui;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UIManager;
public class StarShine extends JComponent{
private List stars=new
LinkedList();
private static Random
random=new Random();
private static Color[][]
colors={
{Color.WHITE, Color.BLACK},
{Color.WHITE, Color.BLUE},
{Color.ORANGE, Color.PINK},
{Color.ORANGE, Color.green}
};
private String
menInfo="";
public StarShine(){
setBackground(Color.WHITE);
//每秒输出内存信息
new Timer(500, new ActionListener() {
public
void actionPerformed(ActionEvent evt) {
//随机多边形
int centerX
=random.nextInt(getWidth());
int centerY
=random.nextInt(getHeight());
double innerSize = 1 + (25 *
Math.random());
double outerSize = innerSize
+ 10 + (15 * Math.random());
int numPoints = (int)(8 *
Math.random() + 5);
stars.add(getStar(centerX,centerY,innerSize,outerSize,numPoints));
//内存信息
long
tm=Runtime.getRuntime().totalMemory();
long
mm=Runtime.getRuntime().maxMemory();
long
fm=Runtime.getRuntime().freeMemory();
long um=tm-fm;
menInfo=String.format("%d /
%d MB %d",
um/(1024*1024),mm/(1024*1024),stars.size());
repaint();
}
}).start();
}
@Override
protected void
paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D)g;
//天空背景
GradientPaint background = new GradientPaint(0f,
0f, Color.GRAY.darker(),
0f, (float)getHeight(),
Color.GRAY.brighter());
g2d.setPaint(background);
g2d.fillRect(0, 0, getWidth(), 4*getHeight()/5);
//地面背景
background = new GradientPaint(0f,
(float)4*getHeight()/5,
Color.BLACK,
0f, (float)getHeight(),
Color.GRAY.darker());
g2d.setPaint(background);
g2d.fillRect(0, 4*getHeight()/5, getWidth(),
getHeight()/5);
//开启抗锯齿
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
//画所有的星星
for (Shape star : stars) {
Rectangle
rect = star.getBounds();
Point2D
center = new Point2D.Float(
rect.x + (float)rect.width / 2.0f,
rect.y + (float)rect.height / 2.0f);
float
radius = (float)rect.width / 2.0f;
float[]
dist = {0.1f, 0.9f};
//圆形辐射颜色渐变模式
RadialGradientPaint paint = new RadialGradientPaint(center, radius,
dist, colors[random.nextInt(colors.length)]);
g2d.setPaint(paint);
g2d.fill(star);
}
g2d.drawString(menInfo,10, 10);
}
private static Shape
getStar(double x, double y,
double
innerRadius, double outerRadius,int pointsCount) {
GeneralPath path = new GeneralPath();
double outerAngleIncrement = 2 * Math.PI /
pointsCount;
double outerAngle = 0.0;
double innerAngle = outerAngleIncrement / 2.0;
x += outerRadius;
y += outerRadius;
float x1 = (float) (Math.cos(outerAngle) *
outerRadius + x);
float y1 = (float) (Math.sin(outerAngle) *
outerRadius + y);
float x2 = (float) (Math.cos(innerAngle) *
innerRadius + x);
float y2 = (float) (Math.sin(innerAngle) *
innerRadius + y);
path.moveTo(x1, y1);
path.lineTo(x2, y2);
outerAngle += outerAngleIncrement;
innerAngle += outerAngleIncrement;
for (int i = 1; i < pointsCount; i++) {
x1 =
(float) (Math.cos(outerAngle) * outerRadius + x);
y1 =
(float) (Math.sin(outerAngle) * outerRadius + y);
path.lineTo(x1, y1);
x2 =
(float) (Math.cos(innerAngle) * innerRadius + x);
y2 =
(float) (Math.sin(innerAngle) * innerRadius + y);
path.lineTo(x2, y2);
outerAngle
+= outerAngleIncrement;
innerAngle
+= outerAngleIncrement;
}
path.closePath();
return path;
}
private static void
createAndShowGUI() {
final JFrame f = new JFrame("Star Shine");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(800, 500);
f.add(new StarShine());
f.setVisible(true);
f.setLocationRelativeTo(f.getOwner());
}
public static void
main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
public
void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
}
createAndShowGUI();
}
});
}
}
看效果:
好了
满天星效果简单实例实现完毕
有问题发我邮箱
1360461332@qq.com
我的更多文章:
java满天星系列之(四)动态星星结合内存效果 泽0715 新浪博客
(2016-01-12 11:23:41)
java满天星系列之(三)JFrame实现满天星一闪一闪动态效果 泽0715 新浪博客
(2016-01-11 09:46:20)
java满天星系列之(二)JFrame实现满天星效果 泽0715 新浪博客
(2016-01-10 17:45:59)
java满天星系列之(一)Frame实现满天星效果 泽0715 新浪博客
(2016-01-07 11:11:06)
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