instance of 연산자 실습 코드 (livestudy 3주차)

Example01.java

public class Example01{
    Integer num = 20;
}

Example02.java

public class Example02 extends Example01 {
    String greeting = "Hello";
}

StudyHalle03.java

public class StudyHalle03 {
    public static void main(String[] args) {
        Arithmetic arithmetic = new Arithmetic();
        Example01 ex01 = new Example01();
        Example02 ex02 = new Example02();

        System.out.println((arithmetic instanceof Arithmetic)+"\n");
      
        System.out.println(ex01.num instanceof Integer);
        System.out.println(ex02.greeting instanceof String);
        System.out.println((ex01.num instanceof Object)+"\n");

        System.out.println(ex02 instanceof Example01);
    }
}