getting user inputs

Question

hi I just started learning java and I am trying to get 2 inputs from user and checking which one is greater . But its throwing me exceptional error. Can someone help?

import java.util.Scanner;

class myclass{

public static void main(String[] args){

Scanner a=new Scanner(System.in);
int var1=a.nextInt();
Scanner b=new Scanner(System.in);
int var2=b.nextInt();

if(var1>var2){
System.out.println(var1);
}

}

}

Answer 1

Fixed:

import java.util.Scanner;
public class Main{
private static Scanner sc;

public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int var1;
int var2;
System.out.println("Enter your first number");
var1 = sc.nextInt();

System.out.println("Enter your second number");
var2 = sc.nextInt();

if(var1>var2){
System.out.println("this number is bigger"+ var1);
}
else{
System.out.println("this number is bigger "+var2);
}

}

}

Answer 2

When getting user input you need to initialized the Scanner first:

Scanner sc = new Scanner(System.in);

Then when trying to get user input and placing it into a specialised variable you need to say:

int x;
String y;
String str = "abcdefghijklmnopqrstuvwxyz";

System.out.println("Enter a number");
x = sc.nextInt();
/* this code is telling the compiler to put the imputed integer into this integer variable */

System.out.println("Enter you name: );
y = sc.next();
/* this code is telling the compiler to put the imputed string into this specified string variable */

Scanner SCC = new Scanner(str);
/* this code tells the compiler that the Scanner get the string information from the specified String variable */

Answer 3

Hi Amitha,
This is the best and easiest way to do that.

import java.util.Scanner;

class GetInputFromUser {

public static void main(String args[]){

int num1;
int num2;

Scanner in = new Scanner(System.in);

//get input num for first number
System.out.println("Enter first number of choice.");
num1 = in.nextInt();
System.out.println("num 1 is: " +num1);

//getting input num for second num
System.out.println("Enter Second number of choice");
num2 = in.nextInt();
System.out.println("num 2 is: " +num2);

if (num1 > num2) {
System.out.print(num1 + " is greater");
}else{
System.out.print(num2 + " is greater");// this outputs whether the first number is greater or the the second number
}
}

}