public class PositionWordCombiner {
    private String original,words[];
    int charsCount;

    public PositionWordCombiner(String word, String delimeter){
        setWords(word,delimeter);
        setCharCount();
    }

    public String toString(){
        return getWordsCombined();
    }

    public String getWordsCombined(){
        StringBuilder result = new StringBuilder("ORIGINAL MSG : ");
        result.append(getOriginalWord());
        result.append("\n");
        result.append("COMBINED WORDS : ");
        for(int ch = 0; ch < getCountOFChars(); ++ch)
            result.append(getCharsAt(ch));
        return result.toString();
    }

    private String getCharsAt(int pos){
        StringBuilder result = new StringBuilder();
        for(String s : words)
            result.append(s.charAt(pos));
        return result.toString();
    }

    private void setWords(String w,String d){
        original = w;
        words = w.split(d);
    }

    /*
     * to avoid an IndexOutBoundException
     * we need to know the length of the
     * word considered to be smallest
     */
    private void setCharCount(){
        charsCount = getSmallestWord().length();
    }

    public String getSmallestWord(){
        String smallest = words[0];
        for(int i = 1; i < getNumOfWords(); ++i)
            if(words[i].compareTo(smallest) < 0)
                smallest = words[i];
        return smallest;
    }

    public String getOriginalWord(){
        return original;
    }

    public int getCountOFChars(){
        return charsCount;
    }

    public int getNumOfWords(){
        return words.length;
    }
}

public class WordsCombinerDemo {
    public static void main(String[] args){
        PositionWordCombiner[] pwc = new PositionWordCombiner[3];
        for(int i = 0; i < pwc.length; ++i){
            String input = JOptionPane.showInputDialog("enter word" + (i + 1));
            pwc[i] = new PositionWordCombiner(input," ");
        }
        //display results
        for(int i = 0; i < pwc.length; ++i){
            System.out.printf("WORD # %d \n%s \n\n",i + 1,pwc[i]);
        }
    }
}