CSC 142

CSC 142. Multidimensional Arrays [Reading: chapter 10]. 2D arrays. day. Mo Tu We Th Fr Sa Su. week. 2.3 2.0 0.9 0.1 1.2 2.1 0.0. 1 2 3 4. 1.3 0.0 2.9 1.1 0.2 0.1 0.0. 0.3 0.0 0.8 1.1 2.2 2.5 2.0. 1.2 0.7 0.3 0.0 1.4 2.6 1.3. How to represent a table of data?

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CSC 142

CSC 142. Classes and methods revisited [Reading: chapters 4 and 7]. Overloading: an example. Printing in a console window System.out.print("Hello"); // a string System.out.print(true); // a boolean System.out.print('c'); // a character System.out.print(3); // an integer

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CSC 142

CSC 142. Collections [Reading: Chapter 10]. What is a collection?. A number of things that are grouped together in some way, e.g., A grocery cart contains all of the items that a customer wants to buy A video store contains videos possibly grouped by genre, alphabetical order,…

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Chemistry 142

Chemistry 142. Review. Chapter 13: Chemical Kinetics . Rate Relativ e Rate of Reaction Law of Mass Action and Instantaneous Rate of Reaction Rate Law Reaction order Effect of nature of reactants, temperature, molecular orientation, concentration, catalyst

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CSci 142

CSci 142. Data and Expressions. Data and Expressions. Topics Strings Primitive data types Using variables and constants Expressions and operator precedence Data conversions. Character Strings. A String consists of zero or more characters Represent a String literal with double quotes

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CSC 142

CSC 142. Overriding methods from the Object class: equals, toString. Object class. The ultimate superclass Any object is an Object MyClass c = new MyClass(); System.out.print(c instanceof Object); //prints true All methods from Object are inherited by any other class

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CSC 142

CSC 142. Conditionals [Reading: chapter 5]. Syntax. must be a boolean. It is an error to omit ( and ). executed if condition is false. executed if condition is true. if (condition) { statement1; statement2; } else /* can be omitted if there is no need for an

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CSC 142 Computer Science II

CSC 142 Computer Science II. Zhen Jiang West Chester University zjiang@wcupa.edu. Table of Contents. Introduction to object Class and object Representing objects Calling methods Fields Remarks Value vs. reference Summary. Objects. data type : A category of data values.

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CSC 142

CSC 142. Instance methods [Reading: chapter 4]. Motivation. Divide and conquer Break up a complex task into a set of tasks. Each simpler task is coded in a separate method. Simplify the development of code (faster, less bugs). An illustration. Drawing a mountain landscape

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CSC 142

CSC 142. Object based programming in Java [Reading: chapter 4]. What we have seen so far. A class is made of instance fields: attributes of the class objects instance methods: behavior of the class objects (=what objects can do). instance methods+fields=instance members

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CSC 142

CSC 142. Inheritance [Reading: chapter 13]. Introduction. Classes have proven very useful They help us write programs the way we view the world: interface vs implementation There is more to come! Java supports object oriented programming, i.e., Inheritance (sub classing)

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CSC 142

CSC 142. Primitive types [Reading: chapter 3]. Identifiers: review (1). class, method or variable names Java is case sensitive class HelloWorld  class helloWorld An identifier is composed of letters, digits, underscores, currency symbol can't start with a digit

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CSC 142 Computer Science II

CSC 142 Computer Science II. Zhen Jiang West Chester University zjiang@wcupa.edu. Table of Contents. Introduction to inheritance Inheritance Syntax More! Overridding OOP (object-oriented programming) Summary of modifiers. Introduction.

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CSC 142 Computer Science II

CSC 142 Computer Science II. Zhen Jiang West Chester University zjiang@wcupa.edu. Table of Contents. Introduction to field (attribute) Public and private modifiers Accessor and mutator methods Constructor Static method Instance method Overloading Static variables Summary. Fields.

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CSC 142 Computer Science II

CSC 142 Computer Science II. Zhen Jiang West Chester University zjiang@wcupa.edu. Outline. Motivation Basic items (review of decision structure, loop, etc) Topics. Motivation. Why computer programming?

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CSC 142 Computer Science II

CSC 142 Computer Science II. Zhen Jiang West Chester University zjiang@wcupa.edu. Outline. Problem Arrays Arrays and Loops A Multi-counter Problem Multi-dimensional Arrays Exercises Summary of Learning Materials. How would you solve this?. Consider the following program:

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142

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CSC 142 Java

CSC 142 Java. More About Inheritance & Interfaces [Reading: chapter 13]. Overview. An assortment of topics related to inheritance Class Object toString instanceof Overloading and overriding Abstract and concrete classes Inheritance vs composition: which to use?

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CSC 142

CSC 142. Java objects: a first view [Reading: chapters 1 & 2]. What is an object? (1). An example: a vending machine It has things: candy, cans, coffee, money, … Some information is public: number of candy bars… Some information is private: the amount of money…

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CSC 142

CSC 142. Instance methods [Reading: chapter 4]. Motivation. Divide and conquer Break up a complex task into a set of tasks. Each simpler task is coded in a separate method. Simplify the development of code (faster, less bugs). An illustration. Drawing a mountain landscape

267 views • 24 slides

CSC 142

CSC 142. Classes and methods revisited [Reading: chapters 4 and 7]. Overloading: an example. Printing in a console window System.out.print("Hello"); // a string System.out.print(true); // a boolean System.out.print('c'); // a character System.out.print(3); // an integer

348 views • 20 slides

CSC 142 Computer Science II

CSC 142 Computer Science II. Zhen Jiang West Chester University zjiang@wcupa.edu. Table of Contents. Introduction to object Class and object Representing objects Calling methods Fields Remarks Value vs. reference Summary. Objects. data type : A category of data values.

304 views • 28 slides