JAVA Basics------IO Operations (iii) __java

Scanner class

In fact, we are more commonly used to use the scanner class to enter data, the following to give a scanner example bar

   
   
    
    import java.util.scanner;
    
       /**    * scanner Small example, reading data from the keyboard    * */  public class scannerdemo{      public static void mai N (String[] args) {          SCANNER SCA = NEW&N Bsp Scanner (system.in);           //  read an integer       &NBS P;   int temp = sca.nextint ();           SYSTEM.OUT.PRINTLN (temp);           //Read floating-point numbers        &nbs P;  float flo=sca.nextfloat ();           SYSTEM.OUT.PRINTLN (FLO);     &NBSp;     //read characters           //... And so on, are some too basic, it is not normal.
   
          }  } 

In fact, scanner can accept any input stream

Here's a read from a file using the scanner class

   
   
    
    Import Java.io.File;  
    
    import java.io.FileNotFoundException;  
    
    import Java.util.Scanner;
    
    /**
    
    * Scanner Small example, read from file
    
    * *
    
    /public class scannerdemo{public
    
    static void main (S Tring[] args {
    
    file File = new File ("D:" + File.separator + "Hello.txt");