The bubble sort algorithm sorts the numeric string and returns the sorted string __ algorithm

Package Com.tianwen;

public class Wzhtest {

/**
* @param args
*/
public static void Main (string[] args) {

String str= "2,1,0,3";
Str= "A2-b1,a0-b2,a1-b3,a3-b0";
String Newstr=sortstringtoarray (str);
System.out.println ("sorted string:" +newstr);

}

/**
* Bubble sort algorithm sorts numeric strings and returns the sorted string
* @param str
* @return
*/

public static string Sortstringtoarray (String str) {
if (null==str| | "". Equals (str)) {
return str;
}
String[] Arrstr=str.split (",");
if (arrstr.length<2) {
return str;
}
if (!isnum (Arrstr[0])) {
return str;
}
String temp;
for (int i = 0; i < arrstr.length; i++) {
for (int j = arrstr.length-1; j > i; j--) {
if (integer.valueof (Arrstr[i]) >integer.valueof (Arrstr[j])) {
temp = Arrstr[i];
Arrstr[i] = Arrstr[j];
ARRSTR[J] = temp;
}
}
}
StringBuffer sb=new StringBuffer ();
for (int k=0;k<arrstr.length;k++) {
Sb.append (Arrstr[k]);
if (k<arrstr.length-1) {
Sb.append (",");
}
}
return sb.tostring ();
}

public static Boolean isnum (String str) {
Return Str.matches ("^[-+]?" ( ([0-9]+) ([.] ([0-9]+))? | ([.] ([0-9]+)]?) $");
}
}