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63 lines
2.4 KiB
Markdown
63 lines
2.4 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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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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- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";N;s:2:"id";N;s:21:"follower_notification";N;s:7:"license";N;s:14:"publication_id";N;s:6:"status";N;s:3:"url";N;}'
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mf2_syndicate-to:
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- 'a:1:{i:0;s:4:"none";}'
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mf2_cite:
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- 'a:4:{s:9:"published";s:25:"0000-01-01T00:00:00+00:00";s:7:"updated";s:25:"0000-01-01T00:00:00+00:00";s:8:"category";a:1:{i:0;s:0:"";}s:6:"author";a:0:{}}'
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mf2_mp-syndicate-to:
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- 'a:1:{i:0;s:4:"none";}'
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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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