jodd-core/src/main/java/jodd/io/StreamUtil.java
public static FastCharArrayWriter copy(final Reader input, final int count) throws IOException {
		try (FastCharArrayWriter output = createFastCharArrayWriter()) {
			copy(input, output, count);
			return output;
		}
	}
public static FastCharArrayWriter copy(final Reader input, final int count) throws IOException {
		try (FastCharArrayWriter output = createFastCharArrayWriter()) {
			copy(input, output, count);
			return output;
		}
	}
Copies {@link Reader} to a new {@link FastCharArrayWriter} using buffer and specified encoding.

@see #copy(Reader, Writer, int)