자바 클래스 계층 구조에서 맨 위에 위치
모든 클래스는 extends Object가 생략되어 있음
package ex08;
class Account extends Object{
private String author;
private int number;
private int balance;
public Account(String author, int number, int balance) {
this.author = author;
this.number = number;
this.balance = balance;
}
@Override
public String toString() {
return "안녕"; // 보통 객체 상태값을 적음
}
}
public class ObEx01 {
public static void main(String[] args) {
Account account = new Account("홍길동", 1111, 1000);
System.out.println(account);
//System.out.println(account.toString()); 결과가 같음
System.out.println(account.getClass());
System.out.println(account.hashCode());
}
}
package ex08;
class Account extends Object{
private String author;
private int number;
private int balance;
public Account(String author, int number, int balance) {
this.author = author;
this.number = number;
this.balance = balance;
}
@Override
public String toString() {
return "Account{" +
"author='" + author + '\'' +
", number=" + number +
", balance=" + balance +
'}';
}
}
public class ObEx01 {
public static void main(String[] args) {
Account account = new Account("홍길동", 1111, 1000);
System.out.println(account);
//System.out.println(account.toString());
System.out.println(account.getClass());
System.out.println(account.hashCode());
}
}
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