java scanner
import java.util.Scanner;
// import scanner
Scanner myScanner = new Scanner(System.in); // Make scanner obj
String inputString = myScanner.nextLine(); // Take whole line
boolean inputBoolean = myScanner.nextBoolean(); //Boolean input
long inputLong = myScanner.nextLong(); //Interger,long ... inputscanner 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);how to provide a long string in Java Scanner class
If you use the nextLine() method immediately following the nextInt() method,
nextInt() reads integer tokens; because of this, the last newline character for
that line of integer input is still queued in the input buffer and the next
nextLine() will be reading the remainder of the integer line (which is empty).
So we read can read the empty space to another string might work. Check below
code.
import java.util.Scanner;
public class Solution {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int i = scan.nextInt();
// Write your code here.
double d = scan.nextDouble();
String f = scan.nextLine();
String s = scan.nextLine();
System.out.println("String: " + s);
System.out.println("Double: " + d);
System.out.println("Int: " + i);
}
}how to use scanner class in java
// import Scanner
import java.util.Scanner;
// Initialize Scanner
Scanner input = new Scanner(System.in);
// Test program with Scanner
System.out.println("What is your name?");
String name = input.nextLine();
System.out.println("Hello," + name + " , it is nice to meet you!");Copyright © 2021 Codeinu
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