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69 lines
2.5 KiB
Markdown
69 lines
2.5 KiB
Markdown
---
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id: 2241
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title: Obtaining Command Line Input in Java
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date: 2017-08-28T17:37:59+00:00
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author: Brandon Rozek
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layout: post
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guid: https://brandonrozek.com/?p=2241
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aliases:
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- /2017/08/obtaining-command-line-input-java/
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permalink: /2017/08/obtaining-command-line-input-java/
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medium_post:
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kind:
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- note
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tags: ["Java"]
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---
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To obtain console input for your program you can use the `Scanner` class
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First import the relevant library
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```java
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import java.util.Scanner;
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```
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Then create a variable to hold the `Scanner` object
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```java
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Scanner input;
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input = new Scanner(System.in);
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```
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Inside the parenthesis, the `Scanner` binds to the System input which is by default the console
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The new varible `input` now has the ability to obtain input from the console. To do so, use any of the following methods:
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| Method | What it Returns |
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| -------------- | ---------------------------------------------------------- |
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| `next()` | The next space separated string from the console |
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| `nextInt()` | An integer if it exists from the console |
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| `nextDouble()` | A double if it exists from the console |
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| `nextFloat()` | A float if it exists from the console |
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| `nextLine()` | A string up to the next newline character from the console |
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| `hasNext()` | Returns true if there is another token |
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| `close()` | Unbinds the Scanner from the console |
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Here is an example program where we get the user’s first name
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```java
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import java.util.Scanner;
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public class GetName {
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public static void main(String[] args) {
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Scanner input = new Scanner(System.in);
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System.out.print("Please enter your name: ");
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String firstName = input.next();
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System.out.println("Your first name is " + firstName);
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}
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}
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```
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