Answers for "scanner class in java chapters"

scanner in java

import java.util.Scanner;		//Import Scanner in java

class classname{
  public void methodname(){
    Scanner s_name = new Scanner(System.in);	//Scanner declaration
    //Use Scanner object to take input
    int val1    =  s_name.nextInt();			//int
    float val2  =  s_name.nextFloat();			//float
    double val3 =  s_name.nextDouble();			//double
    string name =  s_name.nextLine();			//string
    char ch     =  s_name.nextLine().charAt(0);	//character
  }}

role of scanner class in java

The Java Scanner class is widely used to parse text for strings 
and primitive types using a regular expression.
It is the simplest way to get input in Java. 
By 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.
  

Scanner in = new Scanner(System.in);