Java by API/java.io/IOException

java.io.IOException

   <source lang="java">
   

import java.io.IOException; public class Main {

 public static void main(String[] args) {
   try {
     while (true) {
       int datum = System.in.read();
       if (datum == -1)
         break;
       System.out.println(datum);
     }
   } catch (IOException ex) {
     System.err.println("Couldn"t read from System.in!");
   }
 }

}

 </source>