http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto.tls;


RFC 2246 6.1

/**
 * RFC 2246 6.1
 */
public class CompressionMethod
{
    public static final short _null = 0;

    /*
     * RFC 3749 2
     */
    public static final short DEFLATE = 1;

    /*
     * Values from 224 decimal (0xE0) through 255 decimal (0xFF)
     * inclusive are reserved for private use.
     */
}