Answers for "how to open scanner in java"

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
  }}

Java scanner example

import java.util.Scanner;
public class AddTwoNumbers2 {

    public static void main(String[] args) {
        
        int num1, num2, sum;
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter First Number: ");
        num1 = sc.nextInt();
        
        System.out.println("Enter Second Number: ");
        num2 = sc.nextInt();
        
        sc.close();
        sum = num1 + num2;
        System.out.println("Sum of these numbers: "+sum);
    }
}

Output:

take input from user in java using scanner

import java.util.*;  
class UserInputDemo   
{  
public static void main(String[] args)  
{  
Scanner sc= new Scanner(System.in);    //System.in is a standard input stream  
System.out.print("Enter first number- ");  
int a= sc.nextInt();  
System.out.print("Enter second number- ");  
int b= sc.nextInt();  
System.out.print("Enter third number- ");  
int c= sc.nextInt();  
int d=a+b+c;  
System.out.println("Total= " +d);  
}  
}