java把特殊符号分割的字符串转为数组

String b="123,543,5243";
//正则表达式
String a[]=b.split(",");
//StringTokenizer
StringTokenizer tokener=new StringTokenizer(b,",");
String []result=new String[tokener.countTokens()];
int i=0;
while(tokener.hasMoreTokens()){
result[i++]=tokener.nextToken();
}

for(String j:result)
System.out.println(j.substring(0, result.length));

for(String j:a)
System.out.println(j.substring(0, a.length));