如何自己自定义重写TreeSet的排序方法

package priv.sex.set;

import java.util.Comparator;
import java.util.TreeSet;

class Mycompore implements Comparator {
    public int compare(Object object1,Object object2) {
        String s1=(String)object1;
        String s2=(String)object2;
        return s1.length()-s2.length();

    }


}
public class CustomTreeSetDemo implements Tool{
    public static void main(String[] args) {
        TreeSet treeSet =new TreeSet(new Mycompore());
        treeSet.add("qwer");
        treeSet.add("asdfg");
        treeSet.add("as");
        treeSet.add("2");
        Tool.IteratorPrint(treeSet);

    }
}