Java God -- How to use split in Java?

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1. Function:  Splits this string around matches of the given regular expression.

2.Pattern:  stringDemo.split(String regex, int limit);

                   -- regex shows how to seperate.

                   -- limit is the length of seperated array of strings.

3.Examples:

example 1:

String str = "SheepCore@leetcode@";
String[] arrOfStr = str.split("@");

output:

   SheepCore

    leetcode

 

example 2:  

String str = "SheepCore@leetcode@";
String[] arrOfStr = str.split("@",1);
System.out.println("The length of array: "+ arrOfStr.length);

output:

SheepCore@leetcode@

The length of array: 1

 

example 3:

 

String str = "SheepCore@leetcode@";
String[] arrOfStr = str.split("@", 0);

output:

SheepCore

leetcode

The length of array: 2     //limit=0时，忽略尾部分隔符，所以尾部分隔出的空串被忽略掉了。

example 4:

 

String str = "SheepCore@leetcode@";
String[] arrOfStr = str.split("@", -1);

output:

SheepCore

leetcode

 

The length of array: 3  //当limit<0时，进行无限次分割，不忽略尾部分隔符。