java_src/src/main/java/com/google/crypto/tink/subtle/Validators.java
/*
   * @throws IOException if {@code f} exists.
   */
@throws IOException if  f exists.
@throws IOException if f exists .
public static void validateNotExists(File f) throws IOException {
    if (f.exists()) {
      throw new IOException(String.format("%s exists, please choose another file\n", f));
    }
  }
public static void validateNotExists ( File f ) throws IOException { if ( f . exists ( ) ) { throw new IOException ( String . format ( "%s exists, please choose another file\n" , f ) ) ; } }
@throws IOException if {@code f} exists.
@throws IOException if { @code f } exists .