import java.nio.charset.*;
public class CharsetTest {
  public static void main(String[] args) {
    try {
      Charset cs1 = Charset.forName(args[0]);
      Charset cs2 = Charset.forName(args[1]);
      System.out.print(cs1.displayName());
      if (cs1.contains(cs2))             // Contient
        System.out.print(" contains ");
      else                               // Ne contient pas
        System.out.print(" does not contain ");
      System.out.println(cs2.displayName());
    } catch(UnsupportedCharsetException e) {
      System.out.println("Charset "+e.getCharsetName()+" not supported");
      System.out.println("Available charsets are :");
      System.out.println(Charset.availableCharsets());
    }
  }
}