Variable Scope

1
Variable Scope

• Brackets, brackets. brackets

2
Variable Scope
/ HelloWorld --- program that prints
something to the screen. _at_author Blanca Polo
/ public class HelloWorld public static
void main (String arg ) String s
Hello World!!! System.out.println( s )

3
VariableScope
public class ParseI public static void main
(String arg )throws Exception
InputStreamReader isr new InputStreamReader(Syst
em.in) BufferedReader br new
BufferedReader(isr) int iNum 0
String sUserInput ""
System.out.println("Enter a number please ")
sUserInput br.readLine( )
System.out.println("You typed " sUserInput)
//risky code try iNum
Integer.parseInt(sUserInput)
System.out.println("Thanks for the number!!! ")
catch(NumberFormatException
nfe) System.out.println("I asked
for a number, dummy!!")
System.out.println("- - - - the end - - - -
") //main // class
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VariableScope
public class ParseI public static void main
(String arg )throws Exception
InputStreamReader isr new InputStreamReader(Syst
em.in) BufferedReader br new
BufferedReader(isr) //risky code try
String sUserInput ""
System.out.println("Enter a number please ")
sUserInput br.readLine( )
System.out.println("You typed "
sUserInput) int iNum 0
iNum Integer.parseInt(sUserInput)
System.out.println("Thanks for the
number!!! ")
catch(NumberFormatException nfe)
System.out.println("I asked for a number,
dummy!!") System.out.println(and
you typed sUserInput)
System.out.println("- - - - the end - - - -
") //main // class