HTML Entity Codes for Special Characters and Tags Replacement using java

[Anu Rangaswamy]

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Hi, I'm new to java and doing a project for replacing Entity Codes for Special Characters and tags in HTML using java.
Are there any free libraries or supporting files available to replace from Char Entity and Decimal Entity to equivalent Hexa Entity in html using java
And also to replace Html tags like
<FONT size="+2" color="#221E1F"></B> to <p class="chaptitle"><a href="contents.html#pre_1" id="pre-1"><span style="color:#000000">
<P align="justify"><FONT size="+1"> to <p class="noindent">
Please help me
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