联盟运作(Union Operation)
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小牛编辑
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2023-12-01
此操作将两个或多个形状作为输入,并返回它们占用的区域,如下所示。
您可以使用名为union()的方法对形状执行并集操作。 由于这是一个静态方法,您应该使用类名(Shape或其子类)来调用它,如下所示。
Shape shape = Shape.subtract(circle1, circle2);
例子 (Example)
以下是联合操作的示例。 在这里,我们绘制两个圆圈并对它们执行并集操作。 将此代码保存在名为unionExample.java的文件中。
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Shape;
public class UnionExample extends Application {
@Override
public void start(Stage stage) {
//Drawing Circle1
Circle circle1 = new Circle();
//Setting the position of the circle
circle1.setCenterX(250.0f);
circle1.setCenterY(135.0f);
//Setting the radius of the circle
circle1.setRadius(100.0f);
//Setting the color of the circle
circle1.setFill(Color.DARKSLATEBLUE);
//Drawing Circle2
Circle circle2 = new Circle();
//Setting the position of the circle
circle2.setCenterX(350.0f);
circle2.setCenterY(135.0f);
//Setting the radius of the circle
circle2.setRadius(100.0f);
//Setting the color of the circle
circle2.setFill(Color.BLUE);
//Performing union operation on the circle
Shape shape = Shape.union(circle1, circle2);
//Setting the fill color to the result
shape.setFill(Color.DARKSLATEBLUE);
//Creating a Group object
Group root = new Group(shape);
//Creating a scene object
Scene scene = new Scene(root, 600, 300);
//Setting title to the Stage
stage.setTitle("Union Example");
//Adding scene to the stage
stage.setScene(scene);
//Displaying the contents of the stage
stage.show();
}
public static void main(String args[]){
launch(args);
}
}
使用以下命令从命令提示符编译并执行保存的java文件。
javac UnionExample.java
java UnionExample
执行时,上面的程序生成一个显示以下输出的JavaFX窗口 -