TransfersService transfersService = IntxServiceFactory.createTransfersService(client);
WithdrawToCryptoAddressRequest request = new WithdrawToCryptoAddressRequest.Builder()
    .portfolio("portfolio_id")
    .asset("ETH")
    .amount("1")
    .address("0x1234567890")
    .build();
WithdrawToCryptoAddressResponse response = transfersService.withdrawToCryptoAddress(request);

For more information, please visit the INTX Java SDK.