比较版本大小java代码

比较两个版本字符串，谁大谁小，

public class Scratch
{
private static int c(String s1, String s2)
{
if (s1 == null && s2 == null)
return 0;
else if (s1 == null)
return -1;
else if (s2 == null)
return 1;

String[] arr1 = s1.split("[^a-zA-Z0-9]+"), arr2 = s2
.split("[^a-zA-Z0-9]+");

int i1, i2, i3;

for (int ii = 0, max = Math.min(arr1.length, arr2.length); ii <= max; ii++) {
if (ii == arr1.length)
return ii == arr2.length ? 0 : -1;
else if (ii == arr2.length)
return 1;

try {
i1 = Integer.parseInt(arr1[ii]);
} catch (Exception x) {
i1 = Integer.MAX_VALUE;
}

try {
i2 = Integer.parseInt(arr2[ii]);
} catch (Exception x) {
i2 = Integer.MAX_VALUE;
}

if (i1 != i2) {
return i1 - i2;
}

i3 = arr1[ii].compareTo(arr2[ii]);

if (i3 != 0)
return i3;
}

return 0;
}

/**
* str1 > str2 返回1
* @param str1
* @param str2
* @return
*/
public static int compare(String str1,String str2) {

str1 = str1.replaceAll("[^0-9.]","");
str2 = str2.replaceAll("[^0-9.]","");

int i = c(str1, str2);
if(i > 0){
return 1;
}
else if(i < 0)
{
return -1;
}
else
{
return 0;
}
}

}