How to change the width and height of an html file using java

Question

I wanted to change width="xyz" , where (xyz) can be any particular value to width="300". I researched on regular expressions and this was the one I am using a syntax with regular expression

String holder = "width=\"340\"";
String replacer="width=\"[0-9]*\"";
theWeb.replaceAll(replacer,holder);

where theWeb is the string . But this was not getting replaced. Any help would be appreciated.

Answer 1

Your regex is correct. One thing you might be forgetting is that in Java all string methods do not affect the current string - they only return a new string with the appropriate transformation. Try this instead:

String replacement = 'width="340"';
String regex = 'width="[0-9]*"';
String newWeb = theWeb.replaceAll(regex, replacement); // newWeb holds new text

Answer 2

Better use JSoup for manipulating and extracting data, etc. from Html

See this link for more details:

http://jsoup.org/