Skip to main content

Scanner Class In Java

My Programming Paradise

The scanner is a class in java. util package used for getting the input from the keyboard. It is the easiest way to get input in java. Java provides various ways to read input from the keyboard.

There are many ways to read data from the keyboard. For example:

1. InputStreamReader

2. Console

3. Scanner

4. DataInputStream etc.

With the help of Scanner in Java, we can get input from the user in primitive types such as int, long, double, byte, float, short, etc.

For Video: Click here

Comments

Popular posts from this blog

Switch Statement In Java

Switch Statement:  The switch statement is just like if-else-if ladder statement. It executes one statement from multiple conditions. It works with a byte, short, int, long, and String. In other words, we can say the Switch case statement is a substitute for a long if statement that compares to several integral values. Syntax of Switch statement in java Enhance Switch or Switch With Arrow: The new syntax uses the -> operator instead of the colon we're used to with switch statements. Also, there's no break keyword. Another addition is the fact that we can now have comma-delimited criteria. Syntax of Enhance Switch in java  

Methods of String in java

  String in Java String:   A Java string is  a sequence of characters that exist as an object of the class java. lang. Here is  the list of important methods available in the java string class: Ø  startsWith ( ): It checks if the string starts with the given prefix. If yes then return true else false. Ø  endsWith () : It checks if the string ends with the given suffix. If yes then return true else false. Ø  substring(int begin index) : It return s  the substring of the string. The substring start s  with the character at the specified index. Ø   substring(Int begin index , int end index) : Returns the substring. The substring starts with the character at begin index and ends with the character at end index. Ø  toLowerCase() : It converts all  the character s  of the string into lower case(Small Letters).   Ø  toUpperCase() : It converts all the character s  of the string into upper case(Capital Let...

Variables and Data types in Java

  MY PROGRAMMING PARADISE Variables: Variables are used to store data in a computer’s memory. In other words, we can say, variables are just like a container that holds the value while the java program executed. There are three types of variables in java: 1-  Local 2-  Instance 3-  Static   Rules for declaring identifier (Variable name) 1-  All identifiers must begin with a letter, currency character, or underscore. 2-  Blank spaces are not allowed. 3-  An identifier name is case-sensitive. 4-  A keyword cannot be used as an identifier.   Declaring variables: byte age = 28; short salary =32500; float price = 25.50f; char name = ‘v’; boolean flag=true;   Data types: There are two types of data types in java. 1-  Primitive Data type 2-  Non- primitive Data types   Primitive Data type: There are mainly eight types of primitive data types: Types Size Range Default Value byte 1 Byte [-128, 127] 0 short 2 Byte [-32,768 , 32...