CS302 Exam 2 Spring 2013 Reference Solution

Part II: Using pre-built classes

1. Write a code fragment...

int MAX_CHARS = 140;
for ( int i = 0; i < phrases.size(); i++ ) 
  if ( phrases.get(i).numChars() > MAX_CHARS ) 
     System.out.println( phrase.get(i).numChars() + " " + phrases.get(i) );

2. Write a class method ...

public static char getFirstUpperCaseLetter(String input) {
   char U = '-';
   boolean found = false;
   for ( int i=0; !found && i < input.length(); i++ ) {
      if ( input.charAt(i) >= 'A' && input.charAt(i) <= 'Z' ) {
         U = input.charAt(i);
         found = true;
      }
   }
   return U;
}

3. Write a class method ...

    public static boolean isPalindrome(String input) {
       boolean isP = true;
       for ( int i=0, j=input.length()-1; isP && i < j; i++, j-- ) 
          if ( input.charAt(i) != input.charAt(j) ) 
           isP = false;
       return isP;
    }