Java 中的动画需要两个基本步骤，创建动画帧，然后允许 Java 为该帧着色。 Applet、AWT、Swing 和 JavaFX 都可以做 Java 动画。 Applet 动画适用于浏览器兼容的应用程序，而 AWT、Swing 和 JavaFX 是独立的应用程序。实际上，大多数应用程序都是独立的。因此，我们将使用 JavaFX 处理我们的动画。
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为什么选择 JavaFX 为什么不选择 AWT 和 Swing？
AWT 拥有重量级组件，而 Swing 没有现代 UI。因此，我们考虑了 JavaFX 动画。它是轻量级且先进的现代 UI 组件，使我们的开发更加轻松。
JavaFX 中的动画类型：
JavaFX动画包是一个包含所有动画类的动画。因此，当我们应用动画时，我们必须导入它们。将动画应用到我们的班级；我们必须扩展动画类。该动画类包含所有必需的动画包。
这个动画提供了旋转功能。包是animation.RotateTransition
语法：
RotateTransition rotate = new RotateTransition(); //creating object for Rotate Transition rotate.play(); //applying rotation by using play() method
这个动画使物体在X、Y、Z三个方向上移动。封装为animation.ScaleTransition
语法：
ScaleTransition rotate = new ScaleTransition(); //creating object for scale transition rotate.play(); //applying rotation by using play() method
此动画以固定的时间间隔将对象从一个位置移动到另一个位置。包是animation.TranslateTransition
语法：
TranslateTransition rotate = new TranslateTransition(); //creating object for Translate transition rotate.play(); //applying rotation by using play() method
此动画通过指定不透明度值使对象变得暗淡。包是animation.FadeTransition
语法：
FadeTransition rotate = new FadeTransition(); //creating object for fade transition rotate.play(); //applying rotation by using play() method
此动画通过指定时间间隔使对象依次填充两种颜色。封装的是animation.FillTransition
语法：
FillTransition rotate = new FillTransition(); //creating object for fill transition rotate.play(); //applying rotation by using play() method
让我们看看下面给出的java动画示例：
代码：
package com.rotate.transition;
import javafx.animation.RotateTransition;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Polygon;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
import javafx.util.Duration;
public class RotateTransitionAnimation extends Application {
@Override
public void start(Stage outStage) throws Exception {
Polygon traingle = new Polygon();// Creating triangle
Double[] doubleValues=new Double[] { 5.0, 5.0, 20.0, 10.0, 10.0, 20.0 };
traingle.getPoints().addAll(doubleValues);
traingle.setFill(Color.LIMEGREEN);
traingle.setStroke(Color.HOTPINK);
traingle.setStrokeWidth(5);
RotateTransition rotateTransition = new RotateTransition();// Creating object for Rotate Transition class
rotateTransition.setAxis(Rotate.Z_AXIS);// Set Axis rotation in Z axis
rotateTransition.setByAngle(360);// Set angle rotation 360 degrees
rotateTransition.setCycleCount(500);// Set cycle count rotation 500
rotateTransition.setDuration(Duration.millis(1000));// Set time duration for change the object
rotateTransition.setAutoReverse(true);//auto reverse activation
rotateTransition.setNode(traingle);//applying rotate transition on triangle
rotateTransition.play();// applying rotation by play method
Group root = new Group(); //creating group for adding elements
root.getChildren().add(traingle); //adding triangle to group
Scene scene = new Scene(root, 700, 500, Color.BLACK);//creating scene
outStage.setScene(scene);//adding scene to stage for display window
outStage.setTitle("Triangle Rotate Transition");
outStage.show();
}
public static void main(String[] args) {
launch(args);//launch method calls start() method internally
}
}输出：
这样，三角形就旋转了。
代码：
package com.scale.transition;
import javafx.scene.Group;
import javafx.stage.Stage;
import javafx.util.Duration;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.animation.ScaleTransition;
import javafx.application.Application;
public class ScaleTransitionAnimation extends Application {
@Override
public void start(Stage stage) {
Circle circle = new Circle(); // Creating Circle
circle.setCenterX(280.0f);// position in X direction
circle.setCenterY(125.0f);// position in Y direction
circle.setRadius(40.0f);// circle radius
circle.setFill(Color.AQUAMARINE);// circle color
circle.setStrokeWidth(21);// stroke width of circle
ScaleTransition scaleTransition = new ScaleTransition();// creating
// object for
// scale
// transition
scaleTransition.setDuration(Duration.millis(2000));// set time duration
scaleTransition.setNode(circle);// applying rotate transition node on
// circle
scaleTransition.setByY(1.5);// Y direction movement
scaleTransition.setByX(1.5);// X direction movement
scaleTransition.setCycleCount(55);// Set cycle count rotation 55
scaleTransition.setAutoReverse(true);// auto reverse activation
scaleTransition.play();// applying rotate transition on circle
Group root = new Group(); // creating group for adding elements
root.getChildren().add(circle); // adding triangle to group
Scene scene = new Scene(root, 600, 500, Color. AZURE);// creating scene
stage.setScene(scene);// adding scene to stage for display window
stage.setTitle("Circle Scale Transition");
stage.show();
}
public static void main(String args[]) {
launch(args);
}
}输出：
这样，圆就会缩放。
代码：
package com.translate.transition;
import javafx.stage.Stage;
import javafx.util.Duration;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.scene.Group;
public class TranslateTransitionAnimation extends Application {
@Override
public void start(Stage outStage) throws Exception {
Rectangle square = new Rectangle(50, 50); // Creating square
square.setFill(Color.AQUA); // square border color
square.setStroke(Color.BLUEVIOLET);// square area color
TranslateTransition translateTranstion = new TranslateTransition();// creating object for Translate transition
translateTranstion.setByY(350);// movement in Y direction
translateTranstion.setDuration(Duration.millis(1500));// time duration
translateTranstion.setCycleCount(450);// Set cycle count rotation 450
translateTranstion.setAutoReverse(true);// auto reverse activation
translateTranstion.setNode(square);// applying rotate transition node on square
translateTranstion.play();// applying rotate transition on circle
Group root = new Group(); // creating group for adding elements
root.getChildren().add(square); // adding square to group
Scene scene = new Scene(root, 600, 500, Color.CHOCOLATE);// creating scene
outStage.setScene(scene);// adding scene to stage for display window
outStage.setTitle("Square Translate Transition");
outStage.show();
}
public static void main(String[] args) {
launch(args);
}
}输出：
这是如何平方缩放过渡移动。
代码：
package com.fade.transition;
import javafx.animation.FadeTransition;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Ellipse;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Duration;
public class FadeTransitionAnimation extends Application {
@Override
public void start(Stage outStage) throws Exception {
Ellipse ellipse = new Ellipse(); // Creating Ellipse object
ellipse.setCenterX(300.0f); //setting ellipse center distance in X direction
ellipse.setCenterY(150.0f); //setting ellipse center distance in Y direction
ellipse.setRadiusX(150.0f); //setting radius in X direction
ellipse.setRadiusY(75.0f);//setting radius in y direction
ellipse.setFill(Color.AQUA); // ellipse border color
ellipse.setStroke(Color.BLUEVIOLET);// ellipse area color
FadeTransition fadeTransition = new FadeTransition();// creating Fade transition object
fadeTransition.setDuration(Duration.millis(5000));// time duration
fadeTransition.setFromValue(10);//setting opacity value for fading
fadeTransition.setToValue(0.1);
fadeTransition.setCycleCount(900);// Set cycle count rotation 900
fadeTransition.setAutoReverse(true);// auto reverse activation
fadeTransition.setNode(ellipse);// applying fade transition node on ellipse
fadeTransition.play();// applying fade transition on ellipse
Group root = new Group(); // creating group for adding elements
root.getChildren().add(ellipse); // adding ellipse to group
Scene scene = new Scene(root, 600, 500, Color.CHOCOLATE);// creating scene
outStage.setScene(scene);// adding scene to stage for display window
outStage.setTitle("Ellipse Fade Transition");
outStage.show();
}
public static void main(String[] args) {
launch(args);
}
}输出：
这样，淡入淡出过渡就发生了。
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