这里面包含了一百多个JAVA源文件

				See also e459 Generating a Symmetric Key. 
				
				    // This method is implemented in e194 Listing All Available Cryptographic Services
				    String[] names = getCryptoImpls("KeyGenerator");
				
				An example of the output: 
				    HmacSHA1
				    Blowfish
				    HmacMD5
				    TripleDES
				    DESede
				    DES