Java Data Type Tutorial - Java System.setIn(InputStream in)

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Syntax

System.setIn(InputStream in) has the following syntax.

public static void setIn(InputStream in)

Example

In the following code shows how to use System.setIn(InputStream in) method.

//www.j  av  a 2  s .  c  om

import java.io.FileInputStream;

public class Main {

   public static void main(String[] args) throws Exception {
     System.setIn(new FileInputStream("file.txt"));

     char ret = (char)System.in.read();

     System.out.println(ret);              
   }
}

The code above generates the following result.

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