Palindrome Detector

A palindrome is a string that reads the same when it is reversed. Punctuation, spaces, and capitalization are ignored. For example the following is a palindrome:

A man, a plan, a canal, Panama!

Let us write a program that determines if its command line argument is a palindrome:

C:\Notes/chap49D>java  PalindromeTester "A man, a plan, a canal, Panama!"
Is a Palindrome

Here is a skeleton of the program:

class Tester
{
  public boolean test( String trial )
  {
    . . . .
  }
}

public class PalindromeTester
{
  public static void main ( String[] args )
  {
    if ( args.length == 0 )
    {
      System.out.println( "usage: java Palindrome \"Trial String\" " );
      return;
    }

    Tester pTester = new Tester();

    if ( pTester.test( args[0] ) )
      System.out.println( "Is a Palindrome" );
    else
      System.out.println( "Not a Palindrome" );
  }
}