List list = new ArrayList();
StringTokenizer st = new StringTokenizer(text, " ");
while(st.hasMoreTokens()) {
list.add(0, st.nextToken());
}
StringBuffer sb = new StringBuffer();
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
String word = (String) iterator.next();
sb.append(word);
if (iterator.hasNext()) {
sb.append(" ");
}
}
String reversed = sb.toString();

public class Solution44 {
public static void main(String[] args) {
String text = "This is the end, my only friend!";
List list = new ArrayList();
StringTokenizer st = new StringTokenizer(text, " ");
while(st.hasMoreTokens()) {
list.add(0, st.nextToken());
}
StringBuffer sb = new StringBuffer();
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
String word = (String) iterator.next();
sb.append(word);
if (iterator.hasNext()) {
sb.append(" ");
}
}
String reversed = sb.toString();
System.out.println("reversed = " + reversed);
}
}

List<String> ls = Arrays.asList("This is the end, my only friend!".split("\\s"));
Collections.reverse(ls);
StringBuilder sb = new StringBuilder(32); for (String s : ls) sb.append(" ").append(s);
String reversed = sb.toString().trim();

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class SolutionXX {
public static void main(String[] args) {
List<String> ls = Arrays.asList("This is the end, my only friend!".split("\\s"));
Collections.reverse(ls);
StringBuilder sb = new StringBuilder(32); for (String s : ls) sb.append(" ").append(s);
String reversed = sb.toString().trim();
}
}

String reversed = StringUtils.reverseDelimited("This is the end, my only friend!", ' ');

import org.apache.commons.lang.StringUtils;

public class SolutionXX {
public static void main(String[] args) {
String reversed = StringUtils.reverseDelimited("This is the end, my only friend!", ' ');

System.out.println(reversed);
}
}