User 클래스

public class User {
	private int userNo;
	private String id;
	private String email;
	public User(int userNo, String id, String email) {
		super();
		this.userNo = userNo;
		this.id = id;
		this.email = email;
	}
	@Override
	public String toString() {
		return "User [userNo=" + userNo + ", id=" + id + ", email=" + email + "]";
	}		
}

Main 클래스

public class Main {
	public static void main(String[] args) {
		User user = new User(1, "admin", "admin@naver.com");
		System.out.println(user);
	}
}