´ÙÀ½ÀÇ ÇÁ·Î±×·¥À» Á÷Á¢ ¼öÇà½ÃÄÑ º¸°í ¿©·¯ °¡Áö¸¦ ¼öÁ¤ÇÏ¸é¼ Å×½ºÆ® Çغ¸½Ã¿À.
- ColorPointEx
- SuperEx
- InstanceOfEx
- MethodOverridingEx
- GoodCalc
- InterfaceEx
- ConstructorEx
- ConstructorEx2
- ConstructorEx2
- ConstructorEx3
- ConstructorEx4
- UpcastingEx
- DowncastingEx
- SubObject
- SuperObject
- SubObject
½Ç½À¹®Á¦ ¾Æ·¡ÀÇ ¹®Á¦¸¦ Ç®¾î Á¦ÃâÇϽÿÀ. 1 ¿øÀ» Ç¥렿ÇÏ´Â ´ÙÀ½ Circle Ŭ·¡½º°¡ ÀÖ´Ù. class Circle { private int radiusl public Circle(int radius) { this.radius = radius;} public int getRadius() { return radius; } Circle Ŭ·¡½º¸¦ »ó¼Ó¹ÞÀº NamedCircle Ŭ·¡½º¸¦ ÀÛ¼ºÇÏ¿©, ´ÙÀ½ main()À» ½ÇÇàÇÒ ¶§ ´ÙÀ½ ½ÇÇà °á°ú¿Í °°ÀÌ Ãâ·ÂµÇµµ·Ï Ç϶ó. public static void main(String[] args) { } 2 ÀÎÅÍÆäÀ̽º AdderInterfaceÀÇ ÄÚµå´Â ´ÙÀ½°ú °°´Ù. interface AdderInterface { int add(int x, int y); int add(int n); } AdderInterface¸¦ »ó¼Ó¹ÞÀº Ŭ·¡½º MyAdder¸¦ ÀÛ¼ºÇÏ¿©, ´ÙÀ½ main()À» ½ÇÇàÇÒ ¶§ ¾Æ·¡ ½ÇÇà °á°ú¿Í °°ÀÌ Ãâ·ÂµÇµµ·Ï Ç϶ó. 3 ´ÙÀ½ ÄÚµå¿Í ½ÇÇà °á°ú¸¦ Âü°íÇÏ¿© Ãß»ó Ŭ·¡½º Calculator¸¦ »ó¼Ó¹Þ´Â Adder¿Í Subtracter Ŭ·¡½º¸¦ ÀÛ¼ºÇ϶ó. import java.util.Scanner; abstract class Calculator { abstract proctected int calc(); // Ãß»ó ¸Þ¼Òµå // ÀÌ °÷¿¡ Adder¿Í Subtracter Ŭ·¡½º¸¦ ÀÛ¼ºÇ϶ó. public class App { adder.run(); } 4 2Â÷¿ø »óÀÇ ÇÑ Á¡À» Ç¥ÇöÇÏ´Â Point Ŭ·¡½º´Â ´ÙÀ½°ú °°´Ù. ´ÙÀ½ main()À» ½ÇÇàÇÏ¿© °á°ú°¡ ±×¸²°ú °°µµ·Ï, Point¸¦ »ó¼Ó¹ÞÀº ColorPoint Ŭ·¡½º(main() Æ÷ÇÔ)¸¦ ÀÛ¼ºÇ϶ó. public static void main(String[] args) { } 5 ´ÙÀ½ StackInterface´Â ¹®ÀÚ¿À» Ǫ½ÃÇÏ°í ÆËÇÒ ¼ö ÀÖ´Â ½ºÅÿ¡ ´ëÇÑ ½ºÆåÀ» Á¤ÀÇÇÏ°í ÀÖ´Ù. StackInterface¸¦ »ó¼Ó¹Þ´Â StringStack Ŭ·¡½º¸¦ ±¸ÇöÇ϶ó. ±×¸®°í StackManager Ŭ·¡½º¿¡ main() ¸Þ¼Òµå¸¦ ÀÛ¼ºÇÏ¿© StringStack °´Ã¼¸¦ »ý¼ºÇÏ°í, »ç¿ëÀڷκÎÅÍ ¹®ÀÚ¿À» 5°³ ÀÐ¾î ½ºÅà °³Ã¼¸¦ ÀúÀåÇÏ°í, ´Ù½Ã ÆËÇÏ¿© ÀÐÀº ¹Ý´ë¼øÀ¸·Î Ãâ·ÂÇ϶ó. 6
NamedCircle w = new NamedCircle(5, "Waffle");
w.show(); public static void main(String[] args) {
MyAdder adder = new MyAdder();
System.out.println(adder.add(5, 10));
System.out.println(adder.add(10));
}
protected int a, b;
protected void input() { // µÎ Á¤¼ö¸¦ ÀԷ¹޴ ¸Þ¼Òµå
Scanner scanner = new Scanner(System.in);
System.out.print("Á¤¼ö 2°³¸¦ ÀÔ·ÂÇϼ¼¿ä>>");
a = scanner.nextInt();
b = scanner.nextInt();
}
public void run() { // µÎ Á¤¼ö¸¦ ÀÔ·Â¹Þ¾Æ °è»êÇÏ°í °á°ú¸¦ Ãâ·ÂÇÏ´Â ¸Þ¼Òµå
input();
int res = calc();
System.out.println("°è»êµÈ °ªÀº " + res);
}
}
public static void main(String[] args) {
Adder adder = new Adder();
Subtracter sub = new Subtracter();
sub.run();
}class Point {
private int x, y;
public Point(int x, int y) { this.x = x; this.y = y; }
public int getX() { return x; }
public int getY() { return y; }
protected void move(int x, int y) { this.x = x; this.y = y; }
}
ColorPoint cp = new ColorPoint(5, 5,"YELLOW");
cp.setPoint(10, 20);
cp.setColor("GREEN");
cp.show();interface StackInterface {
int length();
String pop();
boolean push(String ob);
}°£´ÜÇÑ ±×·¡ÇÈ ÆíÁý±â¸¦ ¸¸µé¾îº¸ÀÚ. º»¹® 5.6ÀýÀÇ ¸Þ¼Òµå ¿À¹ö¶óÀ̵ù°ú 5.7ÀýÀÇ Ãß»óŬ·¡½ºÀÇ ¼³¸í Áß¿¡ Line, Rect, Circle Ŭ·¡½º Äڵ带 È°¿ëÇÏ¿©, ´ÙÀ½ ½ÇÇà °á°úó·³ µ¿ÀÛÇÏ´Â ÇÁ·Î±×·¥À» ÀÛ¼ºÇ϶ó.
Open Challenge | |
BearÀÇ Fish ¸Ô±â °ÔÀÓ | |
ÀÌ °ÔÀÓ¿¡´Â Bear¿Í Fish °´Ã¼°¡ µîÀåÇϸç, À̵éÀº 10Çà 20¿ÀÇ °ÝÀÚÆÇ¿¡¼ °¢°¢ Á¤ÇØÁø ±ÔÄ¢¿¡ ÀÇÇØ ¿òÁ÷ÀδÙ. Bear´Â »ç¿ëÀÚÀÇ Å°¿¡ ÀÇÇØ ¿ÞÂÊ(a Å°), ¾Æ·¡(s Å°), À§(d Å°), ¿À¸¥ÂÊ (f Å°)À¸·Î ÇÑ Ä¾¿ ¿òÁ÷ÀÌ°í Fish´Â ´Ù¼¸ ¹ø Áß ¼¼¹øÀº Á¦ÀÚ¸®¿¡ ÀÖ°í, ³ª¸ÓÁö µÎ¹øÀº 4°¡Áö ¹æÇâ Áß ·£´ýÇÏ°Ô ÇÑ Ä¾¿ ¿òÁ÷ÀδÙ. °ÔÀÓÀº Bear°¡ Fish¸¦ ¸ÔÀ¸¸é(FishÀÇ À§Ä¡·Î À̵¿) ¼º°øÀ¸·Î ³¡³´Ù. ´ÙÀ½Àº °¢ °³Ã¼ÀÇ À̵¿À» Á¤ÀÇÇÏ´Â move()¿Í °¢ °³Ã¼ÀÇ ¸ð¾çÀ» Á¤ÀÇÇÏ´Â getShape()À» Ãß»ó ¸Þ¼Òµå·Î °¡Áø Ãß»ó Ŭ·¡½º GameObjectÀÌ´Ù. GameObject¸¦ »ó¼Ó¹Þ¾Æ Bear¿Í Fish Ŭ·¡½º¸¦ ÀÛ¼ºÇ϶ó. ±×¸®°í ÀüüÀûÀÎ °ÔÀÓÀ» ÁøÇàÇÏ´Â Game Ŭ·¡½º¿Í main()ÇÔ¼ö¸¦ ÀÛ¼ºÇÏ°í ÇÁ·Î±×·¥À» ¿Ï¼ºÇ϶ó.
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