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Input/Output Stream in java

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input/output are the two major processes in any application development. java follows the stream based input/output. A stream is a channel through which data will be transmitted. example:- Advantages of stream based I/O over Normal I/O:- Abstraction:-  Streams hides the internal complexity of I/O. Flexibility:- Streams provides a flexibility to be used in the program according to the requirement. Efficiency:-  Streams also performs the additional operations onto the data so stream based I/O always be effective over the normal I/O.                   Their are two types of streams in java- 1:- Byte Stream:- it follows the 8 bit sequence. 2:- Character Stream:- it follows the 16 bit sequence.        java.io package provides classes known as Stream classes whose objects are considered as the stream in the java applications.         InputStream & OutputStream classes:-  These are the base classes for all the byte type streams that means all the byt
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Reflection in java

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Reflection:-         Reflection is the way to recognize any class at the runtime even if their name is found at runtime. If at the development time the class name is not known by the developer then we cann't use that class without reflection.        The use of class can be load that class, to create the object of that class, invocation of the methods. By Reflection the details of the class can also be obtained such as list of their methods, list of constructors, list of the fields, name of parent class and list of implemented interfaces. Note:- Reflection is meta data of class.         According to the Reflection each and every class and members of that class represented by the objects these objects are known as the reflected object or meta object.         Through the reflection in any java program we can obtained the meta data. java.lang.Class:-                 This is a class, In the heap area a  separate object of Class class always be created for the each loaded cla
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define System.out.println()?

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In the System.out.println()           -System is a class that is define in the java.lang package which is by default imported in our program.          -out, is the object of PrintStream class and it is declared as static in the System class.          -println(), is the function of PrintStream class.       Code to demonstrate how the "out" object associate with System class :- class System1 {              static PrintStream1 out;              //starting of static block              static                                                           {                       out=new PrintSream1();              } } class PrintStream1 {          public void printline()          {                      //code of the printline() by java developers........          }  } class <userdefine> {         public static void main(String[] args)         {                   System1.out1.printline();         } } This is called class level association, we assoc
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