'Public class circle' diaporamas de présentation

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The complete Circle class

The complete Circle class. public class Circle { public double x,y; // center coordinates public double r; // radius // the methods public double circumference() { return 2*3.14*r; } public double area() { return 3.14*r*r; } }. Using the Circle class.

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Visibilities and Static-ness

Visibilities and Static-ness. Aaron Bloomfield CS 101-E. Our Circle class. We are going to write a Circle class Somebody else is going to use it. public class Circle { double radius; double Pi = 3.1415926536; }. Note the radius field is not initialized. Remember that a

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Programming in Java

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CS2111 Spring 2013. Instructor: David Gries

CS2111 Spring 2013. Instructor: David Gries. Website. www.cs.cornell.edu/courses/CS2111/2013sp/. You job: Come to class each week, take part. My job in first few weeks : Get you to under- stand and be facile with basics of OO (Object-Oriented) Programming in Java.

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JAVA BASICS

JAVA BASICS. Primitive data types are like C. Main data types are int , double , boolean , char Also have byte , short , long , float boolean has values true and false Declarations look like C, for example, double x, y; int count = 0;. Comments are almost like C++.

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Unit 6: Object-oriented Programming: Objects and Classes

Unit 6: Object-oriented Programming: Objects and Classes. Jin Sa. Objectives of this unit. To learn how to declare a class and how to create an object of a class. To learn how to send messages to other objects. To understand the difference between instance and static variables and methods.

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Unit 6: Object-oriented Programming: Objects and Classes

Unit 6: Object-oriented Programming: Objects and Classes. Jin Sa. Objectives of this unit. To learn how to declare a class and how to create an object of a class. To learn how to send messages to other objects. To understand the difference between instance and static variables and methods.

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Inheritence

Inheritence. Put classes into a hierarchy derive a new class based on an existing class with modifications or extensions. Avoiding duplication and redundancy Classes in the lower hierarchy is called a subclass (or derived , child , extended class ).

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Lecture 3

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Chapter 8 Classes and Objects

Chapter 8 Classes and Objects. Passing parameters to methods The Object Class Inner Classes. Passing parameters to method. Java uses exactly one mode of passing parameters: pass by value . When passing by value of a primitive data type,

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Chapter 8 Classes and Objects

Chapter 8 Classes and Objects. Passing parameters to methods The Object Class Inner Classes. Passing parameters to method. Java uses exactly one mode of passing parameters: pass by value . When passing by value of a primitive data type,

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CORE JAVA CONCEPTS

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Introduction to Programming G50PRO University of Nottingham Unit 9 : Classes and objects

Introduction to Programming G50PRO University of Nottingham Unit 9 : Classes and objects. Essam Eliwa http://www.cs.nott.ac.uk/~eoe eoe@cs.nott.ac.uk Room B49. Overview. A more close look on classes and objects A brief introduction to object-oriented programming in java. What Is a Class?.

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Introduction to Programming G50PRO University of Nottingham Unit 9 : Classes and objects

Introduction to Programming G50PRO University of Nottingham Unit 9 : Classes and objects. Paul Tennent http://paultennent.wordpress.com/G50PRO.html Paul.tennent@nottingham.ac.uk Room C7. Overview. A more close look on classes and objects

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