Java Basic Knowledge Hardening 29:scanner Class Scanner overview

1.Scanner Overview:

JDK5 later used to get the user's keyboard input

2.Scanner Method of Construction:

Public Scanner (InputStream source)

3. Case:

1  Packagecn.itcast_01;2 3 /*4 * Scanner: Used to receive keyboard input data. 5  * 6 * In front of the time:7 * A: Guide Package8 * B: Create object9 * C: Call methodTen  *  One * There is a static field under the System class: A * public static final inputstream in; standard input stream, corresponding to keyboard input.  -  *  - * InputStream is = system.in; the  *  - * Class Demo { - * public static final int x = ten; - * public static final Student s = new Student (); +  * } - * int y = demo.x; + * Student s = demo.s; A  *  at  *  - * Construction Method: - * Scanner (inputstream source) -  */ - ImportJava.util.Scanner; -  in  Public classScannerdemo { -      Public Static voidMain (string[] args) { to         //Creating Objects +Scanner sc =NewScanner (system.in); -  the         intx =sc.nextint (); *          $System.out.println ("x:" +x);Panax Notoginseng     } -}

Java Basic Knowledge Hardening 29:scanner Class Scanner overview