The close() method closes the file or input stream that the scanner was reading. After calling the close() method, the current Scanner object can no longer be used.Note: Closing a scanner that was created with
Java SE 02 一、用户交互Scanner java.util.Scanner是Java5的新特性,可以通过Scanner类来获取用户的输入 基本语法: Scanner s = new Scanner(System.in); /*... ... ... */ s.close(
* java.io.Closeable} interface then the readable's close method * will be invoked. If this scanner is already closed then invoking this * method will have no effect. * * Attempting to perform search operations after a scanner has * been closed will result in an {@link IllegalStateException...
3. Java Scanner Regular Expression Example Let’s say we have a string source and we want to process only integers present in that. We can use the scanner with the non-digit regex to get only integers as tokens to process them. //using regex to read only integers from a string sourceS...
of this class is capable of scanning numbers in the standard formats as well as in the formats of the scanner's locale. A scanner's initial locale is the value returned by the Locale.getDefault(Locale.Category.FORMAT) method; it may be changed via the useLocale(java.util.Locale) method....
next(); scanner.close(); // Put this call in a finally block origin: stackoverflow.com How can I get the user input in Java? Scanner scanner = new Scanner (System.in); System.out.print("Enter your name"); name = scanner.next(); // Get what the user types. origin: stack...
scan.close();} } 执行以上程序输出结果为：$ javac ScannerDemo.java $ java ScannerDemo 输入整数：12 整数数据：12 输入小数：1.2 小数数据：1.2 2. Java 异常处理 异常是程序中的一些错误，但并不是所有的错误都是异常，并且错误有时候是可以避免的。要理解Java异常处理是如何工作的，你需要掌握以下三种...
That way, we tellScannerto skip the return line and let thenextLine()method to read the next user input. 13. Conclusion In this tutorial, we went over multiple real-world examples of using theJavaScanner. We learned how to read input from a file, console, orStringusingScanner.We also le...
[1]Method ---方法之说 1.next(),nextInt(),nextLong(),nextLine() ... 比如我们在控制台输入为123 123 Scanner s = new Scanner(System.in); System.out.println(s.next()); System.out.println(s.next()); 上面的输出便是 123 123 如果...
java.util.Scanner 是 Java5 的新特征,我们可以通过 Scanner 类来获取用户的输入。...下面是创建 Scanner 对象的基本语法: Scanner scanner = new Scanner(System.in); 接下来我们演示一个最简单的字符串输入,并通过 Scanner 类的 next...对象 scanner.close(); 输出结果: 输入的三个字符串神仙、妖怪、谢谢 ...