Java Tutorial For Beginners | Hadoop Java Programming Tutorial | Hadoop Training | Simplilearn Video Lecture | Taming the Big Data with HAdoop and MapReduce - Software Development

hello and welcome to lesson number eight
on Hadoop training offered by simply
learn in this lesson we will try to do
some practical exercises in order to
brush up our java programming skills
here we will discuss some useful Java
programs and unit test program to test
our Java programming skills we will
start with our first Java program in the
next slide let us try to create a
program in Java to swap two integers
also in the program we need to create a
user defined class here we create a
user-defined class swap numbers which
contains a swap method represented by
the word swamp with a pair of brackets
in Java programming syntax on line
number seven we create a scanner class
object on line number eight and nine we
take inputs using scanner class and
assign it on x and y variable on line
number 14 we create a user-defined
class that is swap numbers in this class
we use t EMP as a third variable on line
number 17 we create a method that is
swap method which actually swapped two
variables on the next slide we will
discuss another Java program let us now
try to create a program in Java to
extract a substring without the first
five characters from a given string
we use substring method to extract from
a string represented by the word
substring in a pair of brackets in java
programming syntax on line number 10 we
assign hello simply learn on STR on the
next line we use substring method and
pass 5 as a parameter to discard first
five characters and reassign on STR on
line 12 we print it on console in the
next slide we will start discussing the
concept of unit testing