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class hello {
public static void main(String[] args) throws ParseException {
Scanner sc = new Scanner(System.in);
TreeSet<String> ts = new TreeSet<>(new Comparator<String>() {
@Override
public int compare(String c1,String c2) {
// TODO Auto-generated method stub
int result = c1.compareTo(c2);
return result == 0?1:result;
}
});
while( true ) {
String s = sc.nextLine();
if(s.equals("exit")){
break;
}
ts.add(s);
}
System.out.println(ts);
输出结果: