problem in spliting a text

[vipinvijay]

Hi,
I am using "\\s+" to seperate string on behalf of multiple space. But when the space occur at the starting of string in that case it took that as a token. Plz tell me the reason behind it. While the same thing works in StringTokenizer

String input=" one two three four five ";
//using split method
String[] outputArr=input.split("\\s+");
for(int i=0;i<outputArr.length;i++)
System.out.println("Element["+i+"]:"+outputArr[i]);
//using tokenizer
StringTokenizer str=new StringTokenizer(input);
while(str.hasMoreElements())
System.out.println("Element:"+str.nextToken());

[charleyjoyce]

you will have to read the StringTokenizer API to see how it works (see especially the part where it explains what a token represents). one way to solve your problem if you don't want the extra space in front is to do a trim() first before splitting.

[JosAH]

Hi,
I am using "\\s+" to seperate string on behalf of multiple space. But when the space occur at the starting of string in that case it took that as a token. Plz tell me the reason behind it. While the same thing works in StringTokenizer

String input=" one two three four five ";
//using split method
String[] outputArr=input.split("\\s+");
for(int i=0;i<outputArr.length;i++)
System.out.println("Element["+i+"]:"+outputArr[i]);
//using tokenizer
StringTokenizer str=new StringTokenizer(input);
while(str.hasMoreElements())
System.out.println("Element:"+str.nextToken());

The String.split( ... ) method treats the delimeters as tokens that terminate other tokens, e.g. the String " foo bar ", when split with "\\s+" is treated as three separate tokens: "", "foo" and "bar". It's a bit of a nuisance ...

kind regards,

Jos

[quad64bit]

You can always split on just the character " ". This works fine fine if there are only single spaces - your version is more flexible, but requires more toying with.