java 問題(print user input)

Java has a class for doing exactly what you'd like to do.
If you need more information, see 參考資料 or PM me.
Here's an example:
import java.util.StringTokenizer;
....
StringTokenizer st = new StringTokenizer("my name is paul");
while (st.hasMoreTokens()) {
System.out.println(st.nextToken());
}