cdm/src/main/java/ucar/unidata/io/RandomAccessFile.java
public final void writeBytes(char b[], int off, int len) throws IOException {
    for (int i = off; i < len; i++) {
      write((byte) b[i]);
    }
  }
public final void writeBytes(char b[], int off, int len) throws IOException {
    for (int i = off; i < len; i++) {
      write((byte) b[i]);
    }
  }
Writes the character array to the file as a sequence of bytes. Each
character in the string is written out, in sequence, by discarding
its high eight bits.

@param b   a character array of bytes to be written.
@param off the index of the first character to write.
@param len the number of characters to write.
@throws IOException if an I/O error occurs.