JavaFX | Dimension2D 类

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。

类的构造函数：

1. Dimension2D(double width, double height) ：创建具有指定宽度和高度的维度对象。

常用方法：

Method	Explanation
equals(Object obj)	Returns whether the two Dimension2D object are equal or not
getHeight()	Returns the height of the Dimension2d object
getWidth()	Returns the width of the Dimension2d object
hashCode()	Returns a hash code value for the Dimension2D object.

下面的程序将说明 Dimension2D 类的使用：

1. 用于创建 Dimension2D 对象并显示其内容的Java程序：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程序显示其内容以及一个对象是否等于另一个对象：该程序创建三个 Dimension2D 对象，名为dimension_1 、 dimension_2 、 dimension_3 。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：上述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