Integer.parseInt()与StringTokenizer

import java.util.*;
import java.text.*;
public class DateConverter {

     public static void main(String []args){
 /*分割符a之间的字符串需是数字型的字符串。否则运行时java.lang.NumberFormatException*/
           String s="2005a04a30";
           StringTokenizer st=new StringTokenizer(s,"a");//建立一个在String s中以a为分割符的对象
           int year=Integer.parseInt(st.nextToken());
           int month=Integer.parseInt(st.nextToken());
           int day=Integer.parseInt(st.nextToken());
           System.out.println("year: "+year);
           System.out.println("month: "+month);
           System.out.println("day: "+day);

           String s1="20050430";
           // int all=Integer.parseInt(s);  //运行时java.lang.NumberFormatException
          int all=Integer.parseInt(s1);
          System.out.println("all: "+all);
    }
}

output:

year: 2005
month: 4
day: 30
all: 20050403