Anima��o de texto

<SPAN >
<P class=MsoNormal ><SPAN ><STRONG>Animaç�o de texto</STRONG></FONT></SPAN></P>
<P class=MsoNormal ><SPAN ><STRONG></STRONG></FONT></SPAN> </P>
<P class=MsoNormal ><SPAN >Esta dica Java mostra como criar uma pequena animaç�o de texto.</FONT></SPAN></SPAN>

<amp-img src='https://www.devmedia.com.br/imagens/javamagazine/figanimatexto.JPG' alt='DevMedia' height='372' width='650' layout='responsive'></amp-img>

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Checkbox;
import java.awt.Choice;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Image;import java.awt.Label;
import java.awt.MediaTracker;
import java.awt.Panel;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.net.URL;
import java.text.NumberFormat;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class TextBouncer extends JPanel implements Runnable {
 private boolean trucking = true;

 private long[] previousTimes; // millisegundos

 private int previousIndex;

 private boolean previousFilled;

 private double frameRate; // frames por segundo

<SPAN >  </SPAN><B><SPAN lang=EN-US >private </SPAN></B><SPAN lang=EN-US >Image image = </SPAN><B><SPAN lang=EN-US >null</SPAN></B><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static void </SPAN></B><SPAN lang=EN-US >main(String[] args) {</SPAN>

String s = "Java Source and Support";

<B><SPAN lang=EN-US >final int </SPAN></B><SPAN lang=EN-US >size = </SPAN><SPAN lang=EN-US >64</SPAN><SPAN lang=EN-US >;</SPAN>

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(args.length > </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >)</SPAN>

s = args[0];

Panel controls = new Panel();

<B><SPAN lang=EN-US >final </SPAN></B><SPAN lang=EN-US >Choice choice = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Choice();</SPAN>

GraphicsEnvironment ge = GraphicsEnvironment
.getLocalGraphicsEnvironment();
Font[] allFonts = ge.getAllFonts();

<B><SPAN lang=EN-US >for </SPAN></B><SPAN lang=EN-US >(</SPAN><B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >i = </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >; i < allFonts.length; i++)</SPAN>

choice.addItem(allFonts[i].getName());

<SPAN lang=EN-US >Font defaultFont = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Font(allFonts[</SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >].getName(), Font.PLAIN, size);</SPAN>

<B><SPAN lang=EN-US >final </SPAN></B><SPAN lang=EN-US >TextBouncer bouncer = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >TextBouncer(s, defaultFont);</SPAN>

<SPAN lang=EN-US >Frame f = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >AnimationFrame(bouncer);</SPAN>

<SPAN lang=EN-US >f.setFont(</SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Font(</SPAN><SPAN lang=EN-US >"Serif"</SPAN><SPAN lang=EN-US >, Font.PLAIN, </SPAN><SPAN lang=EN-US >12</SPAN><SPAN lang=EN-US >));</SPAN>

<SPAN lang=EN-US >controls.add(bouncer.createCheckbox(</SPAN><SPAN lang=EN-US >"Antialiasing"</SPAN><SPAN lang=EN-US >,</SPAN>

TextBouncer.ANTIALIASING));

<SPAN lang=EN-US >controls.add(bouncer.createCheckbox(</SPAN><SPAN lang=EN-US >"Gradient"</SPAN><SPAN lang=EN-US >, TextBouncer.GRADIENT));</SPAN>

<SPAN lang=EN-US >controls.add(bouncer.createCheckbox(</SPAN><SPAN lang=EN-US >"Shear"</SPAN><SPAN lang=EN-US >, TextBouncer.SHEAR));</SPAN>

<SPAN lang=EN-US >controls.add(bouncer.createCheckbox(</SPAN><SPAN lang=EN-US >"Rotate"</SPAN><SPAN lang=EN-US >, TextBouncer.ROTATE));</SPAN>

<SPAN lang=EN-US >controls.add(bouncer.createCheckbox(</SPAN><SPAN lang=EN-US >"Axes"</SPAN><SPAN lang=EN-US >, TextBouncer.AXES));</SPAN>

Panel fontControls = new Panel();

<SPAN lang=EN-US >choice.addItemListener(</SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >ItemListener() {</SPAN>

public void itemStateChanged(ItemEvent ie) {

<SPAN lang=EN-US >Font font = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Font(choice.getSelectedItem(), Font.PLAIN, size);</SPAN>

bouncer.setFont(font);
}
});
fontControls.add(choice);

<SPAN lang=EN-US >Panel allControls = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Panel(</SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >GridLayout(</SPAN><SPAN lang=EN-US >2</SPAN><SPAN lang=EN-US >, </SPAN><SPAN lang=EN-US >1</SPAN><SPAN lang=EN-US >));</SPAN>

allControls.add(controls);
allControls.add(fontControls);
f.add(allControls, BorderLayout.NORTH);

<SPAN lang=EN-US >f.setSize(</SPAN><SPAN lang=EN-US >300</SPAN><SPAN lang=EN-US >,</SPAN><SPAN lang=EN-US >300</SPAN><SPAN lang=EN-US >);</SPAN>

f.setVisible(true);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private boolean </SPAN></B><SPAN lang=EN-US >mAntialiasing = false, mGradient = </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private boolean </SPAN></B><SPAN lang=EN-US >mShear = false, mRotate = false, mAxes = </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static final int </SPAN></B><SPAN lang=EN-US >ANTIALIASING = </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static final int </SPAN></B><SPAN lang=EN-US >GRADIENT = </SPAN><SPAN lang=EN-US >1</SPAN><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static final int </SPAN></B><SPAN lang=EN-US >SHEAR = </SPAN><SPAN lang=EN-US >2</SPAN><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static final int </SPAN></B><SPAN lang=EN-US >ROTATE = </SPAN><SPAN lang=EN-US >3</SPAN><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static final int </SPAN></B><SPAN lang=EN-US >AXES = </SPAN><SPAN lang=EN-US >5</SPAN><SPAN lang=EN-US >;</SPAN>

 private float mDeltaX, mDeltaY;

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private float </SPAN></B><SPAN lang=EN-US >mX, mY, mWidth, mHeight;</SPAN>

 private float mTheta;

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private float </SPAN></B><SPAN lang=EN-US >mShearX, mShearY, mShearDeltaX, mShearDeltaY;</SPAN>

 private String mString;

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public </SPAN></B><SPAN lang=EN-US >TextBouncer(String s, Font f) {</SPAN>

<SPAN lang=EN-US >previousTimes = </SPAN><B><SPAN lang=EN-US >new long</SPAN></B><SPAN lang=EN-US >[</SPAN><SPAN lang=EN-US >128</SPAN><SPAN lang=EN-US >];</SPAN>

<SPAN lang=EN-US >previousTimes[</SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >] = System.currentTimeMillis();</SPAN>

previousIndex = 1;
previousFilled = false;
mString = s;
setFont(f);
Random random = new Random();
mX = random.nextFloat() * 500;
mY = random.nextFloat() * 500;
mDeltaX = random.nextFloat() * 3;
mDeltaY = random.nextFloat() * 3;
mShearX = random.nextFloat() / 2;
mShearY = random.nextFloat() / 2;
mShearDeltaX = mShearDeltaY = .05f;

<SPAN lang=EN-US >FontRenderContext frc = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >FontRenderContext(null, true, </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >);</SPAN>

Rectangle2D bounds = getFont().getStringBounds(mString, frc);
mWidth = (float) bounds.getWidth();

<SPAN lang=EN-US >mHeight = (</SPAN><B><SPAN lang=EN-US >float</SPAN></B><SPAN lang=EN-US >) bounds.getHeight();</SPAN>

<SPAN lang=EN-US >addComponentListener(</SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >ComponentAdapter() {</SPAN>

public void componentResized(ComponentEvent ce) {
Dimension d = getSize();

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mX < </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >)</SPAN>

mX = 0;
else if (mX + mWidth >= d.width)
mX = d.width - mWidth - 1;

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mY < </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >)</SPAN>

mY = 0;
else if (mY + mHeight >= d.height)
mY = d.height - mHeight - 1;
}
});
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public void </SPAN></B><SPAN lang=EN-US >setSwitch(</SPAN><B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >item, </SPAN><B><SPAN lang=EN-US >boolean </SPAN></B><SPAN lang=EN-US >value) {</SPAN>

<B><SPAN lang=EN-US >switch </SPAN></B><SPAN lang=EN-US >(item) {    </SPAN><B><SPAN lang=EN-US >case </SPAN></B><SPAN lang=EN-US >ANTIALIASING:</SPAN>

mAntialiasing = value;
break;
case GRADIENT:
mGradient = value;
break;
case SHEAR:
mShear = value;
break;
case ROTATE:
mRotate = value;
break;
case AXES:
mAxes = value;
break;
default:
break;
}
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected </SPAN></B><SPAN lang=EN-US >Checkbox createCheckbox(String label, </SPAN><B><SPAN lang=EN-US >final int </SPAN></B><SPAN lang=EN-US >item) {</SPAN>

<SPAN lang=EN-US >Checkbox check = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Checkbox(label);</SPAN>

<SPAN lang=EN-US >check.addItemListener(</SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >ItemListener() {</SPAN>

public void itemStateChanged(ItemEvent ie) {
setSwitch(item, (ie.getStateChange() == ie.SELECTED));
}
});
return check;
 }

 public void timeStep() {
Dimension d = getSize();

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mX + mDeltaX < </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >)</SPAN>

mDeltaX = -mDeltaX;
else if (mX + mWidth + mDeltaX >= d.width)
mDeltaX = -mDeltaX;

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mY + mDeltaY < </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >)</SPAN>

mDeltaY = -mDeltaY;
else if (mY + mHeight + mDeltaY >= d.height)
mDeltaY = -mDeltaY;
mX += mDeltaX;
mY += mDeltaY;

mTheta += Math.PI / 192;

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mTheta > (</SPAN><SPAN lang=EN-US >2 </SPAN><SPAN lang=EN-US >* Math.PI))</SPAN>

mTheta -= (2 * Math.PI);

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mShearX + mShearDeltaX > </SPAN><SPAN lang=EN-US >.5</SPAN><SPAN lang=EN-US >)</SPAN>

mShearDeltaX = -mShearDeltaX;

<B><SPAN lang=EN-US >else if </SPAN></B><SPAN lang=EN-US >(mShearX + mShearDeltaX < -</SPAN><SPAN lang=EN-US >.5</SPAN><SPAN lang=EN-US >)</SPAN>

mShearDeltaX = -mShearDeltaX;

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mShearY + mShearDeltaY > </SPAN><SPAN lang=EN-US >.5</SPAN><SPAN lang=EN-US >)</SPAN>

mShearDeltaY = -mShearDeltaY;

<B><SPAN lang=EN-US >else if </SPAN></B><SPAN lang=EN-US >(mShearY + mShearDeltaY < -</SPAN><SPAN lang=EN-US >.5</SPAN><SPAN lang=EN-US >)</SPAN>

mShearDeltaY = -mShearDeltaY;
mShearX += mShearDeltaX;
mShearY += mShearDeltaY;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public void </SPAN></B><SPAN lang=EN-US >paint(Graphics g) {</SPAN>

Graphics2D g2 = (Graphics2D) g;
setAntialiasing(g2);
setTransform(g2);
setPaint(g2);
// Desenha a string.
g2.setFont(getFont());
g2.drawString(mString, mX, mY + mHeight);
drawAxes(g2);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected void </SPAN></B><SPAN lang=EN-US >setAntialiasing(Graphics2D g2) {</SPAN>

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mAntialiasing == </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >)</SPAN>

return;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected void </SPAN></B><SPAN lang=EN-US >setTransform(Graphics2D g2) {</SPAN>

Dimension d = getSize();

<B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >cx = d.width / </SPAN><SPAN lang=EN-US >2</SPAN><SPAN lang=EN-US >;</SPAN>

<B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >cy = d.height / </SPAN><SPAN lang=EN-US >2</SPAN><SPAN lang=EN-US >;</SPAN>

g2.translate(cx, cy);
if (mShear)
g2.shear(mShearX, mShearY);
if (mRotate)
g2.rotate(mTheta);
g2.translate(-cx, -cy);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected void </SPAN></B><SPAN lang=EN-US >setPaint(Graphics2D g2) {</SPAN>

if (mGradient) {

<SPAN lang=EN-US >GradientPaint gp = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >GradientPaint(</SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >, </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >, Color.blue, </SPAN><SPAN lang=EN-US >50</SPAN><SPAN lang=EN-US >, </SPAN><SPAN lang=EN-US >25</SPAN><SPAN lang=EN-US >,</SPAN>

Color.green, true);
g2.setPaint(gp);
} else
g2.setPaint(Color.orange);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected void </SPAN></B><SPAN lang=EN-US >drawAxes(Graphics2D g2) {</SPAN>

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(mAxes == </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >)</SPAN>

return;
g2.setPaint(getForeground());
g2.setStroke(new BasicStroke());
Dimension d = getSize();

<B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >side = </SPAN><SPAN lang=EN-US >20</SPAN><SPAN lang=EN-US >;</SPAN>

<B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >arrow = </SPAN><SPAN lang=EN-US >4</SPAN><SPAN lang=EN-US >;</SPAN>

<B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >w = d.width / </SPAN><SPAN lang=EN-US >2</SPAN><SPAN lang=EN-US >, h = d.height / </SPAN><SPAN lang=EN-US >2</SPAN><SPAN lang=EN-US >;</SPAN>

g2.drawLine(w - side, h, w + side, h);
g2.drawLine(w + side - arrow, h - arrow, w + side, h);
g2.drawLine(w, h - side, w, h + side);
g2.drawLine(w + arrow, h + side - arrow, w, h + side);
 }

 public void run() {
while (trucking) {
render();
timeStep();
calculateFrameRate();
}
 }

 protected void render() {
Graphics g = getGraphics();

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(g != </SPAN><B><SPAN lang=EN-US >null</SPAN></B><SPAN lang=EN-US >) {</SPAN>

Dimension d = getSize();
if (checkImage(d)) {
Graphics imageGraphics = image.getGraphics();
imageGraphics.setColor(getBackground());

<SPAN lang=EN-US >imageGraphics.fillRect(</SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >, </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >, d.width, d.height);</SPAN>

imageGraphics.setColor(getForeground());
paint(imageGraphics);

<SPAN lang=EN-US >g.drawImage(image, </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >, </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >, </SPAN><B><SPAN lang=EN-US >null</SPAN></B><SPAN lang=EN-US >);</SPAN>

imageGraphics.dispose();
}
g.dispose();
}
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected boolean </SPAN></B><SPAN lang=EN-US >checkImage(Dimension d) {</SPAN>

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(d.width == </SPAN><SPAN lang=EN-US >0 </SPAN><SPAN lang=EN-US >|| d.height == </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >)</SPAN>

return false;

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(image == </SPAN><B><SPAN lang=EN-US >null </SPAN></B><SPAN lang=EN-US >|| image.getWidth(</SPAN><B><SPAN lang=EN-US >null</SPAN></B><SPAN lang=EN-US >) != d.width</SPAN>

<SPAN lang=EN-US >|| image.getHeight(</SPAN><B><SPAN lang=EN-US >null</SPAN></B><SPAN lang=EN-US >) != d.height) {</SPAN>

image = createImage(d.width, d.height);
}
return true;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >protected void </SPAN></B><SPAN lang=EN-US >calculateFrameRate() {</SPAN>

long now = System.currentTimeMillis();
int numberOfFrames = previousTimes.length;
double newRate;
if (previousFilled)
newRate = (double) numberOfFrames

<SPAN lang=EN-US >/ (</SPAN><B><SPAN lang=EN-US >double</SPAN></B><SPAN lang=EN-US >) (now - previousTimes[previousIndex]) * </SPAN><SPAN lang=EN-US >1000.0</SPAN><SPAN lang=EN-US >;</SPAN>

else

<SPAN lang=EN-US >newRate = </SPAN><SPAN lang=EN-US >1000.0 </SPAN><SPAN lang=EN-US >/ (</SPAN><B><SPAN lang=EN-US >double</SPAN></B><SPAN lang=EN-US >) (now - previousTimes[numberOfFrames - </SPAN><SPAN lang=EN-US >1</SPAN><SPAN lang=EN-US >]);</SPAN>

<SPAN lang=EN-US >firePropertyChange(</SPAN><SPAN lang=EN-US >"frameRate"</SPAN><SPAN lang=EN-US >, frameRate, newRate);</SPAN>

frameRate = newRate;
previousTimes[previousIndex] = now;
previousIndex++;
if (previousIndex >= numberOfFrames) {
previousIndex = 0;
previousFilled = true;
}
 }

 public double getFrameRate() {
return frameRate;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private transient </SPAN></B><SPAN lang=EN-US >AnimationFrame mRateListener;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public void </SPAN></B><SPAN lang=EN-US >setRateListener(AnimationFrame af) {</SPAN>

mRateListener = af;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public void </SPAN></B><SPAN lang=EN-US >firePropertyChange(String name, </SPAN><B><SPAN lang=EN-US >double </SPAN></B><SPAN lang=EN-US >oldValue, </SPAN><B><SPAN lang=EN-US >double </SPAN></B><SPAN lang=EN-US >newValue) {</SPAN>

mRateListener.rateChanged(newValue);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private static </SPAN></B><SPAN lang=EN-US >Component sComponent = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Component() {</SPAN>

 };

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private static final </SPAN></B><SPAN lang=EN-US >MediaTracker sTracker = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >MediaTracker(sComponent);</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >private static int </SPAN></B><SPAN lang=EN-US >sID = </SPAN><SPAN lang=EN-US >0</SPAN><SPAN lang=EN-US >;</SPAN>

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static boolean </SPAN></B><SPAN lang=EN-US >waitForImage(Image image) {</SPAN>

int id;
synchronized (sComponent) {
id = sID++;
}
sTracker.addImage(image, id);
try {
sTracker.waitForID(id);

<SPAN lang=EN-US >} </SPAN><B><SPAN lang=EN-US >catch </SPAN></B><SPAN lang=EN-US >(InterruptedException ie) {</SPAN>

return false;
}
if (sTracker.isErrorID(id))
return false;
return true;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public </SPAN></B><SPAN lang=EN-US >Image blockingLoad(String path) {</SPAN>

Image image = Toolkit.getDefaultToolkit().getImage(path);

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(waitForImage(image) == </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >)</SPAN>

return null;
return image;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public static </SPAN></B><SPAN lang=EN-US >Image blockingLoad(URL url) {</SPAN>

Image image = Toolkit.getDefaultToolkit().getImage(url);

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(waitForImage(image) == </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >)</SPAN>

return null;
return image;
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public </SPAN></B><SPAN lang=EN-US >BufferedImage makeBufferedImage(Image image) {</SPAN>

return makeBufferedImage(image, BufferedImage.TYPE_INT_RGB);
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public </SPAN></B><SPAN lang=EN-US >BufferedImage makeBufferedImage(Image image, </SPAN><B><SPAN lang=EN-US >int </SPAN></B><SPAN lang=EN-US >imageType) {</SPAN>

<B><SPAN lang=EN-US >if </SPAN></B><SPAN lang=EN-US >(waitForImage(image) == </SPAN><B><SPAN lang=EN-US >false</SPAN></B><SPAN lang=EN-US >)</SPAN>

return null;

<SPAN lang=EN-US >BufferedImage bufferedImage = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >BufferedImage(image.getWidth(</SPAN><B><SPAN lang=EN-US >null</SPAN></B><SPAN lang=EN-US >),</SPAN>

image.getHeight(null), imageType);
Graphics2D g2 = bufferedImage.createGraphics();
g2.drawImage(image, null, null);
return bufferedImage;
 }
}

<B><SPAN lang=EN-US >class </SPAN></B><SPAN lang=EN-US >AnimationFrame </SPAN><B><SPAN lang=EN-US >extends </SPAN></B><SPAN lang=EN-US >JFrame {</SPAN>

 private Label mStatusLabel;

 private NumberFormat mFormat;

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public </SPAN></B><SPAN lang=EN-US >AnimationFrame(TextBouncer ac) {</SPAN>

super();
setLayout(new BorderLayout());
add(ac, BorderLayout.CENTER);

<SPAN lang=EN-US >add(mStatusLabel = </SPAN><B><SPAN lang=EN-US >new </SPAN></B><SPAN lang=EN-US >Label(), BorderLayout.SOUTH);</SPAN>

mFormat = NumberFormat.getInstance();
mFormat.setMaximumFractionDigits(1);
ac.setRateListener(this);
Thread t = new Thread(ac);
t.start();
 }

<SPAN lang=EN-US >  </SPAN><B><SPAN lang=EN-US >public void </SPAN></B><SPAN lang=EN-US >rateChanged(</SPAN><B><SPAN lang=EN-US >double </SPAN></B><SPAN lang=EN-US >frameRate) {</SPAN>

<SPAN lang=EN-US >mStatusLabel.setText(mFormat.format(frameRate) + </SPAN><SPAN lang=EN-US >" fps"</SPAN><SPAN lang=EN-US >);</SPAN>

 }

}

Anima��o de texto

Esta dica Java mostra como criar uma pequena animação de texto.

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