Java equivalent of Perl/ PHP pack("N", int) function. (Based on Groovy version at https://gist.github.com/enrobsop/8403667)

packN_java

// Java equivalent of:
//      PHP:  pack("N", 123)    and unpack("N", str)
//      Perl: pack("N", 123)    and unpack("N", str)
 
static String packN(int value) {
	byte[] bytes = ByteBuffer.allocate(4).putInt(value).array();
	bytes = toPositiveByteArray(bytes);
	return String.valueOf((char[]) bytes);
}
 
static int unpackN(String value) {
	byte[] bytes = (value.chars as int[]) as byte[];
	ByteBuffer buf = ByteBuffer.allocate(4);
	buf.order(ByteOrder.BIG_ENDIAN);
	buf.put(bytes);
	buf.flip();
	return buf.getInt();
}
 
// converts a byte[] like [0,0,19,-2] to [0,0,19,254]
static def toPositiveByteArray(bytes) {
	bytes.collect {
		it < 0 ? 256 + it : it
	}
}

This doesn't seem to be valid Java (def and as keywords are not java)