how to ask a user to input a number in java code example

Example 1: java get input

Scanner sc = new Scanner(System.in);
String s = sc.next();
int n = sc.nextInt();
double d = sc.nextDouble();
float f = sc.nextFloat();

// more fast way
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String s = br.readLine(); // read line
int c = br.read();        // read single char

Example 2: how to get user input in java

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);  
}  
}