http://www.blogjava.net/Javaphua/archive/2007/06/05/122131.html
1用JAVA自带的函数public static boolean isNumeric(String str){
for (int i = str.length();--i>=0;){
if
代码：
public static void main(String[] args) {
List list = new ArrayList();
list.addAll(Arrays.asList(1, 4, 2, 5));
List sub = list.subList(1, 3);
System.out.println("s
