What is the difference between split method in String class and the split method in Apache StringUtils?

I am reading a file line by line and want to split each line on the basis of specific delimiter.I found some options available in String class and StringUtils class.

So my question is which is the better option to use and why?

It depends on the use case.

What's the difference ?

String[] split(String regEx)

String[] results = StringUtils.split(String str,String separatorChars)

1. Apache utils split() is null safe. StringUtils.split(null) will return null. The JDK default is not null safe:

   try{ String testString = null; String[] result = testString.split("-"); System.out.println(result.length); } catch(Exception e) { System.out.println(e); // results NPE }

2. The default String#split() uses a regular expression for splitting the string.
   The Apache version StringUtils#split() uses whitespace/char/String characters/null [depends on split() method signature].
   Since complex regular expressions are very expensive when using extensively, the default String.split() would be a bad idea. Otherwise it's better.

3. When used for tokenizing a string like following string.split() returns an additional empty string. while Apache version gave the correct results

     String testString = "$Hello$Dear$";

     String[] result = testString.split("\\$");
     System.out.println("Length is "+ result.length); //3
     int i=1;
     for(String str : result) {
        System.out.println("Str"+(i++)+" "+str);
     }

Output

Length is 3
Str1 
Str2 Hello
Str3 Dear

---

String[] result = StringUtils.split(testString,"$");
System.out.println("Length is "+ result.length); // 2
int i=1;
for(String str : result) {
    System.out.println("Str"+(i++)+" "+str);
}

Output

Length is 2
Str1 Hello
Str2 Dear