Hello world - Starting to learn java program
This is a very simple java program for beginners that demonstrates printing
a line of text on the console.
Almost everyone starts learning a new language by writing a Hello World program.
It's one of the simplest program that demonstrates the language syntax and can be
easily understood by a beginner.
This short program demonstrates,how to accept integer inputs from the user
and store them in a variable.
Since for taking input from the user,we need to scan the keyboard, we've included
the scanner class which has the methods which handle this task for us.
We simply need to use these as shown in the code example below.
This short program demonstrates,how to accept integer inputs from the user
and perform arithmetic addition in java.
Like addition, other common arithmetic operations like subtraction,multiplication
division,modulo ,etc can be performed in the same manner by using the appropriate
symbols for those.
Concatenation of strings in Java
String concatenation in java.
The program demonstrates concatenation of two strings using string class
method concat().
The strings can also be concatenated using the "+" operator as shown.
Calculating string length in Java
Program demonstrating use of string methods.
The program demonstrates accepting string from the user and calculating
the length using the string class method length().
Generating random numbers/array in Java
Random number generation in java.
This program shows, the method of generation of random numbers
in java.
To be able to use the random function,we need to import the random class.
The random numbers generated are stored in the array and printed out to the
terminal.
Matrix addition in java.
This program shows an implementation of matrix addition in java.
The program takes input for the 2D matrix from the user. There is no limit on
the matrix size.The user can take any number of rows and columns.
The program then checks,if the addition is possible and performs addition if
it is valid and prints out the resultant matrix.If the matrix addition is not valid,
the program gives an error message.
Matrix subtraction in java.
This program shows an implementation of matrix subtraction in java.
The program takes input for the 2D matrix from the user. There is no limit on
the matrix size.The user can take any number of rows and columns.
The program then checks,if the subtraction is possible and performs subtraction if
it is valid and prints out the resultant matrix.If the matrix subtraction is not valid,
the program gives an error message.