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Is there a way in Java to create a List implementation that has a timeout/eviction policy for items contained in the list? Something along the lines of:
List<SomeObject> myList = new TimeoutList<>(10, TimeUnit.SECONDS);
so that items entered into the list will be automatically evicted after the given time. I know about the Guava Cache, but a cache is a Map and will not maintain the order of the items entered.
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I'm looking an API for video and audio calling which is free and it can handle huge amount of user.
I have try ZegoCloud, VideoSDk, Agora.io all are paid after a certain limit.
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I want to parse a pdf which is having a table. But, couldn't find any library(in java) which could read a pdf in a format in which it appears.
Basically, the existing libraries read a table just as a string without preserving the format. So, what is the best way to parse it and get the list of key value pairs in java?
Pdf screenshot sample
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I have a table in my database. I am using jdbc to use this database. I want to update a particular data by subtracting it to some value.
Suppose a student with name xyz is there. Currently his marks in a subject is 50. I want to delete it by 10, then what would be the syntax? I am new to SQL.
More or less:
update students
set mark = mark - 10
where name = 'xyz'
Can't give a better answer than that, as your question is very limited in useful and concrete information. I'm sure you'll figure it out.
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I want to compare the 2 images(images of people)and want a result that these are of same person or not(By Face recognization).I have to do this for millions of images so I cannot do it manually .Is there any api for android that can be used in my app.
You could use Camera.Face or FaceDetector.Face class. Take parameters of face on both photos and compare their parameters using e.g. eyesDistance(). If those parameters quite the same -> its the same person.
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Is it possible to convert the value of a ResultSet (result of a query execution) into XML??! If so which API would deal with this?!
You can look at these examples:
http://download.oracle.com/javase/1.5.0/docs/api/javax/sql/rowset/WebRowSet.html
http://www.java2s.com/Code/Java/Database-SQL-JDBC/ConvertaResultSettoXML.htm