ITMISS
import java.util.*;class BaiDu{public static void main(String[] args){TreeSet<String> tr = new TreeSet<String>();String[] s ={"11","22","22","33","33","33"};System.out.print("====处理前=======");for(int i=0;i<s.length;i++){System.out.print(s[i]+" ");tr.add(s[i]);}String[] s2= new String[tr.size()];System.out.println("=====处理后======");for(int i=0;i<s2.length;i++){s2[i]=tr.pollFirst();//从TreeSet中取出元素重新赋给数组System.out.print(s2[i]+" ");}}}