java programming // please this question it is confusing me ...could someone hel

Question

java programming

// please this question it is confusing me ...could someone help me ?

//.........................................................................

public class WordCommandLine
{ public static void main (String [ ] args)
{ String word1 ;
String word2 ;
word1 = args [0] ;
word2 = args [1] ;
if ( word1.equalsIgnoreCase(word2) )
System.out.println ( "The words you entered are the same" ) ;
else
System.out.println ( "The words you entered are NOT the same" ) ;
} // end main
}// end class

// ............................................................................

Explanation / Answer

Solution:

1. java WordCommandLine fred zebra

first argument args[0]=fred

second argument args[1]=zebra

both arguments are not equal so it prints

The words you entered are NOT the same

2. java WordCommandLine Zebra ZebRa

first argument args[0]=Zebra

second argument args[1]=ZebRa

comparing args[0] and args[1] with equalsIgnoreCase so the output is

The words you entered are the same

3. java WordCommandLine Zebra ZebRa fred

first argument args[0]=Zebra

second argument args[1]=ZebRa

second argument args[2]=fred

comparing args[0] and args[1] equalsIgnoreCase so the output is

The words you entered are the same

4. java WordCommandLine Zebra

first argument args[0]=Zebra

there is no second arguement

so exception is arised java.lang.ArrayIndexOutOfBoundsException

5.java WordCommandLine 2 3

first argument args[0]=2

second argument args[1]=3

both arguments are not equal so it prints

The words you entered are NOT the same

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