JavaFX 类 Dimension2D用法及代码示例

Dimension2D类是JavaFX的一部分。 Dimension2D类是一个存储高度和宽度的对象。它继承了java.lang.Object类。

该类的构造函数：

1. Dimension2D(double width, double height)：创建具有指定宽度和高度的尺寸对象。

常用方法：

方法	说明
equals(Object obj)	返回两个Dimension2D对象是否相等
getHeight()	返回Dimension2d对象的高度
getWidth()	返回Dimension2d对象的宽度
hashCode()	返回Dimension2D对象的哈希码值。

下面的程序将说明Dimension2D类的用法：

1. Java程序，用于创建Dimension2D对象并显示其内容：该程序创建一个名为Dimension的Dimension2D对象。尺寸的高度和宽度作为参数传递。然后使用getHeight()和getWidth()函数从对象中提取高度和宽度，并显示相应的值。

   // Java program to create a Dimension2D  
   // object and display its contents 
   import javafx.geometry.*; 
     
   public class Dimension_1 { 
     
       // Main Method 
       public static void main(String args[]) 
       { 
     
           // create a dimension object 
           Dimension2D dimension = new Dimension2D(20.0f, 50.0f); 
     
           double height, width; 
     
           // get the height and width of the dimension2D 
           height = dimension.getHeight(); 
           width = dimension.getWidth(); 
     
           // display the height and width of dimension2D 
           System.out.println("Height = " + height + " Width = " + width); 
       } 
   }

   输出：

   Height = 50.0 Width = 20.0
   

2. 创建3个Dimension2D对象的Java程序将显示其内容以及一个对象与另一个对象如何相等：此程序将创建三个名为Dimension_1，dimension_2，dimension_3的Dimension2D对象。尺寸的高度和宽度作为参数传递。然后使用getHeight()和getWidth()函数从对象中提取高度和宽度，并显示相应的值。然后使用equals()函数比较这三个对象，并显示结果。

   // Java program to create 3 Dimension2D objects display 
   // its contents and how whether one object is equal to  
   // the other or not 
   import javafx.geometry.*; 
     
   public class Dimension_2 { 
     
       // Main Method 
       public static void main(String args[]) 
       { 
     
           // create three dimension objects 
           Dimension2D dimension_1 = new Dimension2D(20.0f, 50.0f); 
           Dimension2D dimension_2 = new Dimension2D(120.0f, 150.0f); 
           Dimension2D dimension_3 = new Dimension2D(20.0f, 50.0f); 
     
           // display the coordinates of the 3 dimensions 
           display(dimension_1); 
           display(dimension_2); 
           display(dimension_3); 
     
           // check whether any dimension is equal to other or not 
           System.out.println("Dimension 1 equals Dimension 2 = " 
                              + dimension_1.equals(dimension_2)); 
     
           System.out.println("Dimension 2 equals Dimension 3 = " 
                               + dimension_2.equals(dimension_3)); 
     
           System.out.println("Dimension 3 equals Dimension 1 = " 
                               + dimension_3.equals(dimension_1)); 
       } 
     
       // Display Method 
       public static void display(Dimension2D dimension) 
       { 
     
           double height, width; 
     
           // get the cheight and width of the dimension 
           height = dimension.getHeight(); 
           width = dimension.getWidth(); 
     
           // display the height and width of dimension2D 
           System.out.println("Height = " + height + " Width = " + width); 
       } 
   }

   输出：

   Height = 50.0 Width = 20.0
   Height = 150.0 Width = 120.0
   Height = 50.0 Width = 20.0
   Dimension 1 equals Dimension 2 = false
   Dimension 2 equals Dimension 3 = false
   Dimension 3 equals Dimension 1 = true
   

注意：以上程序可能无法在在线IDE中运行。请使用离线编译器。

参考：https://docs.oracle.com/javase/8/javafx/api/javafx/geometry/Dimension2D.html