One post tagged with "string"

In short:​

• The memory of the String object consists of 24 bytes for metadata + the number of characters times 1 byte or 2 bytes depending on the coder value
  • Metadata: mark word x2 (4 bytes x2 = 8 bytes), class word (4 bytes), array reference byte[] or char[] (4 byte), hash (4 byte), hashIsZero (1 byte), coder (1 byte), padding (2 byte)
• The String object has 2 additional flags:
  • when coder =1 then UTF-16 encoding (2 bytes per character)
  • when coder = 0 then LATIN-1 encoding (1 byte per character)
  • hashIsZero is a flag that tells whether the hash calculation has already been performed