day3.1cse110 - Chapter 2 Data and Expressions Major Topics...

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Chapter 2 Data and Expressions
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2 Major Topics • In this chapter we will focus on data representation and manipulation in Java 1)Strings Displaying strings String concatenation using + Displaying special characters 2) Primitive data types in Java Number data types int: int , long, short, byte Float: float, double Character Char Boolean boolean 3) Data variables and their representation in programs. 4) Operations on data types 5) Data input and the Scanner class
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Displaying Character Strings We have studied how to display a character string using System.out.print, System.out.println commands. The System.out object represents a destination (the monitor screen) to which we can send output System.out.println ("Whatever you are, be a good one."); class method name information provided to the method (parameters)
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2.1 – Countdown.java //******************************************************************** // Countdown.java Java Foundations // // Demonstrates the difference between print and println. //******************************************************************** public class Countdown { //----------------------------------------------------------------- // Prints two lines of output representing a rocket countdown.
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