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Scanner Class Introduction?
The Scanner class in Java is used to read input from the user at the run time from various sources like:
-keyboard input (System.in)
-files
-strings
It is part of the java.util package and is widely used in console-based Java programs to capture user input.
java default package is java.lang.
Syntax
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Scanner objName =new Scanner(System.in);
objName.scannerMethod()
ScannerMethods:-
===============
byte - nextByte();
short- nextShort();
int- nextInt();
long- nextLong();
float- nextFloat();
double - nextDouble();
String - next();
String - nextLine();
boolean - nextBoolean();

What is the difference between next() and nextLine()?
next()
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Reads only one word (up to a space, tab, or newline).
Ignores any spaces after the word.

Example:
Scanner sc = new Scanner(System.in);
System.out.print("Enter your name: ");
String name = sc.next(); // Input: John Doe
System.out.println("Name: " + name);
Output:
Name: John
Only "John" is captured. "Doe" is ignored.

nextLine()
===========
Reads the entire line, including spaces until the Enter key is pressed.

Example:
Scanner sc = new Scanner(System.in);
System.out.print("Enter your name: ");
String name = sc.nextLine(); // Input: John Doe
System.out.println("Name: " + name);
Output:
Name: John Doe
The full line is captured.