Java 10일차 2(오브젝트)

 

public class ObjectArray {

    public static Object getObject(Object obj) {
        return obj;
    }
    public static void main(String[] args) {
        Object[]objects = new Object[7];

        objects[0] = new Student(20220001, "박수현");
        objects[1] = new Car("쏘나타","화이트");
        objects[2] = new Student(20220002, "박수현");
        objects[3] = new Car("k5","블랙");
        objects[4] = new Student(20220003, "황석민");
        objects[5] = "김준일";
        objects[6] = 20221123;

        for (int i = 0; i < objects.length; i++) {
            System.out.println(objects[i]);
        }

    }
}

 

Student{code=20220001, name='박수현'}
Car{model='쏘나타', color='화이트'}
Student{code=20220002, name='박수현'}
Car{model='k5', color='블랙'}
Student{code=20220003, name='황석민'}
김준일
20221123

Process finished with exit code 0

 

objects[5] = "김준일";
objects[6] = 20221123;

 

System.out.println(objects[5].getClass());
System.out.println(objects[6].getClass());

 

class java.lang.String
class java.lang.Integer

 

objects[6] = 20221123.5;

2.02211235E7

class java.lang.Double