public static void main(String[] args) {
String [] str = {"1","2","3","4","2","1"};
Set set = new TreeSet();
for (int i = 0; i < str.length; i++) {
set.add(str[i]);
}
str = (String[]) set.toArray(new String[0]);
for (int i = 0; i < str.length; i++) {
System.out.print(str[i]+ " ");
}
} |