problem in string's split method

[ganesh pol]

String st="172.12.23.23";
String [] st1=st.split(".");
System.out.println("string split ="+st1.length );

above code gives me empty array of String how to change my regex expression i.e "."

so that this method will give give me array with 4 elements=172,12,23,23

[Rusty Shackleford]

Try putting \\ in front of . : "\\."

[Rudy Rusli]

This would also work:
String [] st1=st.split("[.]");

[Scott Selikoff]

You might be thinking of StringTokenizer which can split a string into tokens based on a single value like a "."

[Rusty Shackleford]

Stick with String.split(), it works great and besides StringTokenizer is a legacy class kept around to not break old code, but shouldn't be used on new code.