下列的Java語言程式執行後之輸出為何？ import java.lang.*; import java.util.*; class test { public static void main(String argv[]) { StringBuilder sb=new StringBuilder(); StringTokenizer st; for(int i=0;i<5;i++) if ((i & 0x00000001)==0) sb.append("This is a test"); else sb.append("That is a pencil"); st=new StringTokenizer(sb.toString(),"ts"); System.out.println(st.countTokens()); } }