**StringFormatter**
[[https://secure-media.collegeboard.org/digitalServices/pdf/ap/ap16_frq_computer_science_a.pdf|2016 FRQ 4]]
<code java>
import java.util.ArrayList;
import java.util.List;
/**
 * AP 2016 FRQ 4
 * 
 */
public class StringFormatter
{
    public static int totalLetters( List<String> wordList )
    {
        // add code here for part (a)
    }
    
    public static int basicGapWidth( List<String> wordList, int formattedLen )
    {
        // add code here for part (b)
       
    }
  
    
    public static String format( List<String> wordList, int formattedLen )
    {
        // add code here for part (c)
    }
    /**
     * Implementation of leftoverSpaces
     */
    public static int leftoverSpaces(List<String> wordList, int formattedLen)
    {
        int spaces = formattedLen-totalLetters(wordList);
        int gaps = wordList.size()-1;
        int gapWidth = basicGapWidth(wordList,formattedLen);
        return spaces - gaps*gapWidth;
    }

    public static void testItWith(String[] words, int wordCount, int gaps, int leftOvers)
    {
        ArrayList<String> list = new ArrayList<String>();
        
        for (String str:words){
            list.add(str);
            System.out.print(str+ " ");
        }
        System.out.print("\nPart A: Total number of letters in words:"+wordCount+"\nyour code:");
        System.out.println(totalLetters(list));
        System.out.print("Part B Basic gap width: "+gaps+"\nyour code:");
        System.out.println(basicGapWidth(list,20 ));        
        System.out.print("Leftover spaces: "+leftOvers+"\nyourcode:"); 
        System.out.println(leftoverSpaces(list,20));
        String f = format(list,20);
        System.out.print("Part C format should have length 20:\nyour code:");
        System.out.println(f.length()); 
        System.out.println("\"" +f+ "\""); 
        
    }
    
      
    public static void main(String[] args)
    {
        String[] words1 = {"AP", "COMP", "SCI", "ROCKS"};       
        String[] words2 = {"GREEN", "EGGS", "AND", "HAM"};
        String[] words3 = {"BEACH", "BALL"};
        String[] words4 = {"IT","IS", "OK!"};
        testItWith(words1, 14, 2, 0);
        testItWith(words2, 15, 1, 2);
        testItWith(words3, 9, 11, 0);
        testItWith(words4, 7, 6, 1);
    }    
}


</code>

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