PPT-Recitation 3 Interfaces and Constructors

Why interfaces We can define what we expect a class to do without writing any code Multiple classes that have similar functions can be made to follow certain conventions to allow for polymorphism. 012 Spring 2009 Recitation 10 MOSFET VI Characteristics Channel Length Modulation Back Gate E64256ect Yesterday we discussed two more aspects in MOSFET IV characteristics Channel length modulation Backgate e64256ect Here is the nMOS IV characteris Be sure to check your pronunciation with your teacher before you nalize your performance. When an older version of a word is used in a poem, both the modern and historic pronunciations of that word AND. THEIR TYPES. . Prepared . by . MURLI . MANOHAR. PGT . (. COMP. . SCIENCE). KV,B.E.G. ., PUNE. What is a constructor?. . It is a member function which initializes a class.. Ch. 9 – Head First Java. Review from 1. st. part of Ch. 9. Java has 2 areas of memory – stack & heap. Instance variable declared inside a class, outside of a method. Local variables declared inside a method or method parameter. Constructors. You got plenty of experience using constructors in the Marching Band program.. A constructor is the subroutine which creates objects from a class.. Every class has a default constructor which takes no parameters– New().. Lecture # 4. 3-. 2. Arguments Passed By Value. In Java, all arguments to a method are passed “by value”.. If the argument is a reference to an object, it is the reference that is passed to the method.. Abstract classes, Interfaces. A Little More Geometry!. Abstract Classes. Shape. x . ____. y . ____. Triangle. area() . base. ____. height . ____. Circle. area(). radius . _. AND. THEIR TYPES. . Prepared . by . MURLI . MANOHAR. PGT . (. COMP. . SCIENCE). KV,B.E.G. ., PUNE. What is a constructor?. . It is a member function which initializes a class.. INTERACTIONS. Chapter 6. Patrick . Hutto. Dongjin Kim. John . Difante. Lee Hailey. Introduction. Pre-1990s – efficient and effective interfaces . was . main goal. GUI advances, Internet, cell phones, . Casting. Casting reinterprets a variable as a different type.. For example, remember that a double is a decimal, and an integer is not.. When you divide an integer by an integer, you get an integer.. #include “. fraction.h. ”. int. main(). {. float x;. float y = 6.7;. float z(7.2);. Fraction f;. Fraction g(4, 5);. .... . Initializing New Objects. #include “. fraction.h. Casting. Casting reinterprets a variable as a different type.. For example, remember that a double is a decimal, and an integer is not.. When you divide an integer by an integer, you get an integer.. 1. 2. Abstract Classes and Abstract Methods. 2. GeometricObject. Circle. Rectangle. 3. abstract method in abstract class . 3. An abstract method cannot be contained in a . nonabstract. class. . If a subclass of an abstract superclass does not implement all the abstract methods, the subclass must be defined abstract. . Talk to your neighbors:. Share a boring fact about yourself!. BEFORE WE START. Lecture Outline. Announcements. Warm up. Review: Encapsulation, Constructors, . toString. (). Larger Example. Code Quality.