errField.setObjectValue(null, err);
errField.setObjectValueUnchecked(null, err);
  static void setErr(PrintStream err) {    try {      VM_Field errField = 	((VM_Class)JikesRVMSupport.getTypeForClass(System.class))	.findDeclaredField( 			   VM_Atom.findOrCreateUnicodeAtom("err"), 			   VM_Atom.findOrCreateUnicodeAtom("Ljava/io/PrintStream;"));      errField.setObjectValue(null, err);    } catch (Exception e) {      throw new Error( e.toString() );    }  }