hashCode()

- hashCode()의 기능과 사용 예제

-> hashCode()

=> hash code value를 int형으로 반환

=> public native int hashCode()

=> hash code value : 객체가 가지는 유일한 참조값

=> 객체의 메모리를 비교할 때 사용

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import java.util.Date;

public class HashCodeTest {

public static void main(String[] args) {

System.out.println("new Date() : " + new Date().hashCode());

System.out.println("new Object() : " + new Object().hashCode());

System.out.println("new Date() : " + new Date().hashCode());

System.out.println("new Object() : " + new Object().hashCode());

}

}

result : 

new Date() : -919458411

new Object() : 1381270477

new Date() : -919458412

new Object() : 714682869

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