Java(Generic)_01

2024-11-07

 

 

 

 

 

사과입니다~~~

연필입니다~~~

 

package generic;

public class Apple {

	void output() {
		
		System.out.println("사과입니다~~~");
	}
}

Apple

 

package generic;

public class Pencil {

	void output() {
		
		System.out.println("연필입니다~~~");
	}
}

Pencil

 

package generic;

public class Goods1 {

	Apple apple;

	public Apple getApple() {
		return apple;
	}

	public void setApple(Apple apple) {
		this.apple = apple;
	}
}

Goods1

 

package generic;

public class Goods2 {

	Pencil pencil;

	public Pencil getPencil() {
		return pencil;
	}

	public void setPencil(Pencil pencil) {
		this.pencil = pencil;
	}
}

Goods2

 

package generic;

public class Goods_01 {

	public static void main(String[] args) {
		
		Goods1 goods1 = new Goods1();
		
		// Goods1 객체에는 Apple 객체 타입만 입력이 가능.
		//Apple apple = new Apple();
		goods1.setApple(new Apple());	//  위의 코드와 동일.
		
		Apple apple = goods1.getApple();
		
		apple.output();
		
		System.out.println();
		
		
		Goods2 goods2 = new Goods2();
		
		goods2.setPencil(new Pencil());
		
		Pencil pencil = goods2.getPencil();
		
		pencil.output();
				
				
	}
}

Goods_01