How to get the user input in Java?

java input
Jtvd78 picture Jtvd78 · Mar 13, 2011 · Viewed 1.7M times · Source

I attempted to create a calculator, but I can not get it to work because I don't know how to get user input.

How can I get the user input in Java?

Answer

Marco Aviles picture Marco Aviles · Mar 13, 2011

One of the simplest ways is to use a Scanner object as follows:

import java.util.Scanner;

Scanner reader = new Scanner(System.in);  // Reading from System.in
System.out.println("Enter a number: ");
int n = reader.nextInt(); // Scans the next token of the input as an int.
//once finished
reader.close();

Related questions

Take a char input from the Scanner

I am trying to find a way to take a char input from the keyboard. I tried using: Scanner reader = new Scanner(System.in); char c = reader.nextChar(); This method doesn't exist. I tried taking c as a String. Yet, …

Read More
Getting Keyboard Input

How do I get simple keyboard input (an integer) from the user in the console in Java? I accomplished this using the java.io.* stuff, but it says it is deprecated. How should I do it now?

Read More
Resource leak: 'in' is never closed

Why does Eclipse give me the warming "Resource leak: 'in' is never closed" in the following code? public void readShapeData() { Scanner in = new Scanner(System.in); System.out.println("Enter the width of the Rectangle: "); width = in.nextDouble(); System.out.…

Read More