Let's Learn Java API

When we want to get details of the host pc from a java program , we can use the getProperty() method of System class in java.lang package. According to the java documentation(SE6) we can get following information using this class.
Key
Description of Associated Value...

In this example we use a FileReader object wrapped by a BufferedReader object to read a plain text file. This method is more efficient than reading raw bytes and converting them into character array.
Constructors of BufferedReader class
BufferedReader(Reader in)...

FileReader class is located in Java I/O package (java.io.FileReader). using this class we can read character files. In other words we can read character streams using FileRead class. If our purpose is reading bytes (raw bytes) from the files we can use...

String objects contain sequence of charters. Strings can be concatenate using ( + ) operator which is a special java language feature. String class represent a string using UTF -16 (unicode character representation in java)
There are different constructors available in Java we have to select the most suitable construct for our purpose. (Click here to see the constructor summary)...