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                # Java 程序:從標準輸入讀取整數值 > 原文: [https://beginnersbook.com/2017/09/java-program-to-read-integer-value-from-the-standard-input/](https://beginnersbook.com/2017/09/java-program-to-read-integer-value-from-the-standard-input/) 在這個程序中,我們將看到如何讀取用戶輸入的整數。`Scanner`類位于`java.util`包中。它用于捕獲原始類型的輸入,如`int`,`double`等和字符串。 ## 示例:用于讀取用戶輸入的數字的程序 我們已導入包`java.util.Scanner`以使用`Scanner`。為了讀取用戶提供的輸入,我們首先通過傳遞`System.in`作為參數來創建`Scanner`的對象。然后我們使用`Scanner`類的`nextInt()`方法來讀取整數。如果您不熟悉 Java 并且不熟悉 java 程序的基礎知識,那么請閱讀[核心 Java](https://beginnersbook.com/java-tutorial-for-beginners-with-examples/) 的以下主題: + [編寫您的第一個 Java 程序](https://beginnersbook.com/2013/05/first-java-program/) + [JVM 如何工作](https://beginnersbook.com/2013/05/jvm/) ```java import java.util.Scanner; public class Demo { public static void main(String[] args) { /* This reads the input provided by user * using keyboard */ Scanner scan = new Scanner(System.in); System.out.print("Enter any number: "); // This method reads the number provided using keyboard int num = scan.nextInt(); // Closing Scanner after the use scan.close(); // Displaying the number System.out.println("The number entered by user: "+num); } } ``` **輸出:** ```java Enter any number: 101 The number entered by user: 101 ```
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