Javaオブジェクト/クラス/インスタンス/メモリ領域

Section 1. Javaオブジェクトの概念

オブジェクト向けプログラミング

Section 2. Javaクラスの概念

public class Student {

	int studentID;
	String studentName;
	int majorCode;
	String majorName;
	int grade;
    	String address;
        
        public void showStudentInfo() {
		System.out.println(studentName + "," + address);
	}
	
	public String getStudentName() {
		return studentName;
	}
}

public class StudentTest {

	public static void main(String[] args) {
		
		Student studentHong = new Student();	# 인스턴스 1 (studentHong)
		studentLee.studentName = "홍길동";
		studentLee.address = "서울";
		
		studentLee.showStudentInfo();
		
		Student studentKim = new Student();	# 인스턴스 2 (studentKim)
		studentKim.studentName = "김유신";
		studentKim.address = "경주";
		
		studentKim.showStudentInfo();
		
		System.out.println(studentHong);
		System.out.println(studentKim);
	}
}

Section 3. Javaインスタンスの概念