Java Objects

An object is an instance of a class. It is a physical entity.

An object in Java can contain:

• State
• Behavior
• Identity

Example

class Student {
    int id;
    String name;
}

class TestStudent1 {
    public static void main(String[] args) {
        Student s1 = new Student();
        System.out.println(s1.id);
        System.out.println(s1.name);
    }
}

class Student {
    int id;
    String name;
}

class TestStudent1 {
    public static void main(String[] args) {
        Student s1 = new Student();
        System.out.println(s1.id);
        System.out.println(s1.name);
    }
}