Java calculate MD5 hash

use org.apache.commons.codec.digest.DigestUtils instead:

DigestUtils.md5Hex(str);

this will give you 32 char string as a result

You must be missing something. The linked code is just fine. Make sure the issue is nowhere else, related to displaying the result. Possibilities:

• in a GUI too small
• in a console with multithreading issues
• over a network package which is being cut off to soon
• you cut the length to 20 instead of 0x20, which is 32.