Rectangle2D类规定的位置(X,Y)和尺寸(宽x高)定义的矩形。
类的声明
以下是声明类java.awt.geom.Rectangle2D:
public abstract class Rectangle2D extends RectangularShape
字段域
以下是java.awt.geom.Arc2D类字段:
- 
		
static int OUT_BOTTOM -- 位掩码,表示一个点在于低于此Rectangle2D。
 - 
		
static int OUT_LEFT -- 位掩码,表示一个点位于此Rectangle2D的左侧。
 - 
		
static int OUT_RIGHT -- 位掩码,表示一个点位于此Rectangle2D的右侧。
 - 
		
static int OUT_TOP -- 位掩码,表示此Rectangle2D一个点之上。
 
类的构造函数
| S.N. | 构造函数与说明 | 
|---|---|
| 1 | 
				protected Rectangle2D()  这是一个抽象类,不能直接实例化。  | 
		
类方法
| S.N. | 方法和说明 | 
|---|---|
| 1 | 
				void add(double newx, double newy)  Adds a point, specified by the double precision arguments newx and newy, to this Rectangle2D.  | 
		
| 2 | 
				void add(Point2D pt)  Adds the Point2D object pt to this Rectangle2D.  | 
		
| 3 | 
				void add(Rectangle2D r)  Adds a Rectangle2D object to this Rectangle2D.  | 
		
| 4 | 
				boolean contains(double x, double y)  Tests if the specified coordinates are inside the boundary of the Shape.  | 
		
| 5 | 
				boolean contains(double x, double y, double w, double h)  Tests if the interior of the Shape entirely contains the specified rectangular area.  | 
		
| 6 | 
				abstract Rectangle2D createIntersection(Rectangle2D r)  Returns a new Rectangle2D object representing the intersection of this Rectangle2D with the specified Rectangle2D.  | 
		
| 7 | 
				abstract Rectangle2D createUnion(Rectangle2D r)  Returns a new Rectangle2D object representing the union of this Rectangle2D with the specified Rectangle2D.  | 
		
| 8 | 
				boolean equals(Object obj)  Determines whether or not the specified Object is equal to this Rectangle2D.  | 
		
| 9 | 
				Rectangle2D getBounds2D()  Returns a high precision and more accurate bounding box of the Shape than the getBounds method.  | 
		
| 10 | 
				PathIterator getPathIterator(AffineTransform at)  Returns an iteration object that defines the boundary of this Rectangle2D.  | 
		
| 11 | 
				PathIterator getPathIterator(AffineTransform at, double flatness)  Returns an iteration object that defines the boundary of the flattened Rectangle2D.  | 
		
| 12 | 
				int hashCode()  Returns the hashcode for this Rectangle2D.  | 
		
| 13 | 
				static void intersect(Rectangle2D src1, Rectangle2D src2, Rectangle2D dest)  Intersects the pair of specified source Rectangle2D objects and puts the result into the specified destination Rectangle2D object.  | 
		
| 14 | 
				boolean intersects(double x, double y, double w, double h)  Tests if the interior of the Shape intersects the interior of a specified rectangular area.  | 
		
| 15 | 
				boolean intersectsLine(double x1, double y1, double x2, double y2)  Tests if the specified line segment intersects the interior of this Rectangle2D.  | 
		
| 16 | 
				boolean intersectsLine(Line2D l)  Tests if the specified line segment intersects the interior of this Rectangle2D.  | 
		
| 17 | 
				abstract int outcode(double x, double y)  Determines where the specified coordinates lie with respect to this Rectangle2D.  | 
		
| 18 | 
				int outcode(Point2D p)  Determines where the specified Point2D lies with respect to this Rectangle2D.  | 
		
| 19 | 
				void setFrame(double x, double y, double w, double h)  Sets the location and size of the outer bounds of this Rectangle2D to the specified rectangular values.  | 
		
| 20 | 
				abstract void setRect(double x, double y, double w, double h)  Sets the location and size of this Rectangle2D to the specified double values.  | 
		
| 21 | 
				void setRect(Rectangle2D r)  Sets this Rectangle2D to be the same as the specified Rectangle2D.  | 
		
| 22 | 
				static void union(Rectangle2D src1, Rectangle2D src2, Rectangle2D dest)  Unions the pair of source Rectangle2D objects and puts the result into the specified destination Rectangle2D object.  | 
		
继承的方法
这个类继承的方法从以下类:
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java.awt.geom.RectangularShape
 - 
		
java.lang.Object
 
Ellipse2D 实例
选择使用任何编辑器创建以下java程序D:/ > AWT > com > zaixian > gui >
AWTGraphicsDemo.javapackage com.zaixian.gui; import java.awt.*; import java.awt.event.*; import java.awt.geom.*; public class AWTGraphicsDemo extends Frame { public AWTGraphicsDemo(){ super("Java AWT Examples"); prepareGUI(); } public static void main(String[] args){ AWTGraphicsDemo awtGraphicsDemo = new AWTGraphicsDemo(); awtGraphicsDemo.setVisible(true); } private void prepareGUI(){ setSize(400,400); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); } @Override public void paint(Graphics g) { Rectangle2D shape = new Rectangle2D.Float(); shape.setFrame(100, 150, 200,100); Graphics2D g2 = (Graphics2D) g; g2.draw (shape); Font font = new Font("Serif", Font.PLAIN, 24); g2.setFont(font); g.drawString("Welcome to TutorialsPoint", 50, 70); g2.drawString("Rectangle2D.Rectangle", 100, 120); } }
编译程序,使用命令提示符。进入到D:/> AWT,然后键入以下命令。
D:AWT>javac comzaixianguiAWTGraphicsDemo.java
如果没有错误出现,这意味着编译成功。使用下面的命令来运行程序。
D:AWT>java com.zaixian.gui.AWTGraphicsDemo
验证下面的输出
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