NamesComparing_Names.java

package compare.NamesComparing;

import java.util.*;



/**
 * Created by andrew on 17.02.17.
 */
public class Names {
    private List<String> names = new ArrayList<>();

    public Names() {

    }

    public Names addName(String o){
        names.add(o);
        return this;
    }


    public void sortAlphabet (){
        Collections.sort(names);
    }

    public void sortReversed(){
        Collections.sort(names, Comparator.reverseOrder());
    }


    public String leastName(){
        return Collections.min(names);
    }


    public void sortNamesLength(){
        Collections.sort(names, new Comparator<String>() {
            @Override
            public int compare(String o1, String o2) {
                int s1 = o1.length();
                int s2 = o2.length();
                return s1 - s2;
            }
        });
    }
    public void sortByLengthExtended(){
        Collections.sort(names, new Comparator<String>() {

            @Override
            public int compare(String o1, String o2) {
                int s1 = o1.length();
                int s2 = o2.length();
                if(s1!=s2){
                    return s1 -s2;
                }
                else
                    return 0- o1.compareTo(o2);
            }
        });
    }



    @Override
    public String toString() {
        return "Names{" + names +
                '}';
    }
}

NamesComparing_NamesRunner.java

package compare.NamesComparing;

/**
 * Created by andrew on 17.02.17.
 */
public class NamesRunner {
    public static void main(String[] args) {

        Names names = new Names();
        names.addName("Bob").addName("Josh").addName("Michel").addName("Antony");
        System.out.println(names);

        names.sortAlphabet();
        System.out.println(names);
        names.sortReversed();
        System.out.println(names);
        System.out.println(names.leastName());
        names.sortNamesLength();
        System.out.println(names);
        names.sortByLengthExtended();
        System.out.println(names);
    }
}