Sentiment analysis api/tool, for Java

i just tested AlchemyAPI. it's not 100% accurate but i guess this sort of technology is still in its infancy.

you will need to register (free) to get an api key.

here's a sample usage: http://access.alchemyapi.com/calls/text/TextGetTextSentiment?apikey=<insert your api key>&sentiment=1&showSourceText=1&text=Kindle%20e-book%20sales%20soar%20for%20Amazon.%20Amazon.com%20says%20it%20is%20selling%20more%20e-books%20for%20its%20Kindle%20electronic%20reading%20device%20than%20paperback%20and%20hardback%20print%20editions%20combined

the inputs are:

1. sentiment=1
2. showSourceText=1
3. text (i used your sample text, uri encoded)

i got the following output (neutral sentiment, instead of the expected positive sentiment):

<?xml version="1.0" encoding="UTF-8"?>
<results>    
    <status>OK</status>    
    <usage>By accessing AlchemyAPI or using information generated by AlchemyAPI, you are agreeing to be bound by the AlchemyAPI Terms of Use: http://www.alchemyapi.com/company/terms.html</usage>    
    <url></url>    
    <language>english</language>    
    <text>Kindle e-book sales soar for Amazon. Amazon.com says it is selling more e-books for its Kindle electronic reading device than paperback and hardback print editions combined</text>    
    <docSentiment>    
        <type>neutral</type>    
    </docSentiment>    
</results>

another sample usage: http://access.alchemyapi.com/calls/text/TextGetTextSentiment?apikey=<insert your api key>&sentiment=1&showSourceText=1&text=kindle%20is%20amazing

and the output:

<?xml version="1.0" encoding="UTF-8"?>    
<results>    
    <status>OK</status>    
    <usage>By accessing AlchemyAPI or using information generated by AlchemyAPI, you are agreeing to be bound by the AlchemyAPI Terms of Use: http://www.alchemyapi.com/company/terms.html</usage>    
    <url></url>    
    <language>english</language>    
    <text>kindle is amazing</text>    
    <docSentiment>    
        <type>positive</type>    
        <score>0.283568</score>    
    </docSentiment>    
</results>