Chapter 3 - Numerical data. After you have read and studied this chapter, you should be able to: Select proper types for numerical data; write arithmetic expressions in Java; evaluate arithmetic expressions using the precedence rules; describe how the memory allocation works for objects and primitive data values; write mathematical expressions, using methods in the Math class; generate pseudo random numbers. | ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 - Chapter 3 Numerical Data Animated Version Introduction to OOP with Java 4th Ed, C. Thomas Wu © The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 - Objectives After you have read and studied this chapter, you should be able to Select proper types for numerical data. Write arithmetic expressions in Java. Evaluate arithmetic expressions using the precedence rules. Describe how the memory allocation works for objects and primitive data values. Write mathematical expressions, using methods in the Math class. Generate pseudo random numbers. Use the GregorianCalendar class in manipulating date information such as year, month, and day. Use the DecimalFormat class to format numerical data Input and output numerical data by using and Intro to OOP with Java, C. Thomas Wu ©The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 - Manipulating Numbers In Java, to add two numbers x and y, we write x + y But before the actual addition of the two numbers takes place, we must declare their data type. If x and y are integers, we write int x, y; or int x; int y; Intro to OOP with Java, C. Thomas Wu ©The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 - Variables When the declaration is made, memory space is allocated to store the values of x and y. x and y are called variables. A variable has three properties: A memory location to store the value, The type of data stored in the memory location, and The name used to refer to the memory location. Sample variable declarations: int x; int v, w, y; Intro to OOP with Java, C. Thomas Wu ©The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for . | ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 - Chapter 3 Numerical Data Animated Version Introduction to OOP with Java 4th Ed, C. Thomas Wu © The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 - Objectives After you have read and studied this chapter, you should be able to Select proper types for numerical data. Write arithmetic expressions in Java. Evaluate arithmetic expressions using the precedence rules. Describe how the memory allocation works for objects and primitive data values. Write mathematical expressions, using methods in the Math class. Generate pseudo random numbers. Use the GregorianCalendar class in manipulating date information such as year, month, and day. Use the DecimalFormat class to format numerical data Input and output numerical data by using and Intro to OOP with Java, C. Thomas Wu ©The McGraw-Hill Companies,
