Download public class EscapeQuiz

Hello World
AP Computer Science
Below is a simple program which outputs Hello World! Open a new BlueJ project called FirstProject
and copy the following into a class called HelloWorld. Compile and run it to make sure it works.
/**
* This program writes: Hello World!
*
* @author (Haas)
* @version (V1 Fall 2015)
*/
public class HelloWorld // class names should begin with a capital
{
/*
* all programs must
* have a main method
*/
public static void main(String[] args)
{
System.out.println("Hello World"); // prints to the screen
}
}
Note: in Java there are 3 ways to make comments:
// single line
/*
multiple
line
*/
/**
multiple line for
javadoc (special documentation)
*/
Modify the lines of code within the main method as follows and determine what happens.
System.out.println("Hello");
System.out.println("world");
System.out.print("Hello");
System.out.print("world");
Escape characters (also called escape sequences or escape codes)
What if you wanted to print: Mr. Haas said “Hello” How would you do it?
In Java, a character preceded by a backslash (\) is an escape sequence and has special meaning to the
java compiler. Try to figure the function of the following escape sequences:
System.out.println("I like \npizza.");
System.out.println("I like \tpizza.");
System.out.println("I like \"pizza.");
System.out.println("I like \\pizza.");
Escape Sequence
What is its function?
\n
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\t
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\"
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\\
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