Can BitcoinJ (Java) supports complete implementations of BIP 173, BIP 84? How can segwit address can be created using BitcoinJ for SPV wallet?

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i don't think bitcoinj support BIP-173 but you can read more from Bitcoinj repo

For Segwit Bitconj 0.14 branch is ~2 years old and has got no support for segwit at all. For receiving on native Segwit addresses, you can use the master branch. For receiving on P2WPKH-P2SH, I'm not sure. If master doesn't work you can try the segwit branch (but that one isn't tested well).

Warning: master currently has no support for spending segwit outputs. So only use testnet or really small amounts for now.

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