; Java :
1. Rectangle, , (x1, y1) ( ), (x2, y2) ( ). , :
4 (x1, y1), (x2, y2);
2 , (0,0);
(0,0) (0,0).
Rectangle rect_print(), ( ). move (int dx, int dy), dx, dy. Union( ), ( , ).
Rectangle Test, main(). Rectangle : Rectangle , . move() . Union .
2. Rectangle DrawableRect, draw(Graphics g) outColor Color ( java.awt.*). . java.awt.* Graphics ( import java.awt.*;). (, setColor(Color.red)) 2 (x,y), w h drawRect(x,y,h,w) ( , ).
3. DrawableRect ColoredRect, inColor Color. draw(Graphics g) : outColor, inColor. fillRect(x,y,h,w) ( ). Rectangle DrawableRect ColoredRect .
1. ;
2. ;
3. - , ;
4. ( ), ;
5. ( );
6. .
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3
: java, java.awt
: java, java.awt .