[JAVA] Autoboxing / Unboxing 개념

 

AutoBoxing: 변수를 객체에 대입

UnBoxing: 객체를 변수에 대입

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랩퍼클래스와 기본데이터타입간에만 성립

 

 

래퍼클래스(Wrapper Class)란?

https://coding-house.tistory.com/87

[JAVA] 래퍼 클래스(Wrapper Class)

 

AutoBoxing, UnBoxing 예제

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class AutoboxingEx {

	Integer var;

	public void setInt(int i){
		var = i;    //오토박싱
    }

	public Integer getInt(){
		return var;
	}

	public static void main(String[] args){
		AutoboxingEx1 a1 = new AutoboxingEx1();
		a1.setInt(10000);
		int res = a1.getInt(); //언박싱
		System.out.println("res :"+res);
	}
}