# Java – 讀取控制臺輸入 > 原文： [https://howtodoinjava.com/java/io/java-io-how-to-read-input-from-console/](https://howtodoinjava.com/java/io/java-io-how-to-read-input-from-console/) 這是一個快速參考代碼示例，可使用 Java IO 從控制臺讀取輸入。 這主要是為我的初學者準備的，因此，如果您已經知道它，請隨時跳過。 ```java Table of contents 1) Read console input using java.io.Console instance 2) Read console input using BufferedReader instance 3) Read console input using Scanner instance ``` 讓我們直接跳至示例代碼。 1）使用`java.io.Console`實例讀取控制臺輸入 ```java private static void usingConsoleReader() { Console console = null; String inputString = null; try { // creates a console object console = System.console(); // if console is not null if (console != null) { // read line from the user input inputString = console.readLine("Name: "); // prints System.out.println("Name entered : " + inputString); } } catch (Exception ex) { ex.printStackTrace(); } } ``` 2）使用`BufferedReader`實例讀取控制臺輸入 ```java private static void usingBufferedReader() { System.out.println("Name: "); try{ BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in)); String inputString = bufferRead.readLine(); System.out.println("Name entered : " + inputString); } catch(IOException ex) { ex.printStackTrace(); } } ``` 3）使用掃描器實例讀取控制臺輸入 ```java private static void usingScanner() { System.out.println("Name: "); Scanner scanIn = new Scanner(System.in); String inputString = scanIn.nextLine(); scanIn.close(); System.out.println("Name entered : " + inputString); } ``` ## 所有 3 個示例的完整代碼 ```java import java.io.BufferedReader; import java.io.Console; import java.io.IOException; import java.io.InputStreamReader; import java.util.Scanner; public class ConsoleInputExamples { public static void main(String[] args) { usingConsoleReader(); usingBufferedReader(); usingScanner(); } private static void usingConsoleReader() { Console console = null; String inputString = null; try { // creates a console object console = System.console(); // if console is not null if (console != null) { // read line from the user input inputString = console.readLine("Name: "); // prints System.out.println("Name entered : " + inputString); } } catch (Exception ex) { ex.printStackTrace(); } } private static void usingBufferedReader() { System.out.println("Name: "); try{ BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in)); String inputString = bufferRead.readLine(); System.out.println("Name entered : " + inputString); } catch(IOException ex) { ex.printStackTrace(); } } private static void usingScanner() { System.out.println("Name: "); Scanner scanIn = new Scanner(System.in); String inputString = scanIn.nextLine(); scanIn.close(); System.out.println("Name entered : " + inputString); } } ``` > 最重要的是，這三種技術同樣有效，但是我個人喜歡`java.io.Console`方式。 它只是使代碼更具可讀性。 您有什么選擇？ **祝您學習愉快！**