Learning Solidity : Tutorial 33 Deploying and using a contract using Java and web3j

If you would like to donate some Ethereum my wallet is: 0xC8c8c3Fae80e3eD236970e1C93AcF5B91D0993e2
Many thanks!

[exmesan]

huge thanks for tutorials! still waiting for th 34 tutorial :)

[nicoflores]

Thanks for tutorials and I wanted to ask. How could I decode the input data of a transaction with java?

[aarrttjjee]

Great tutorial, I have already deployed a contract (not via web3j) and was wondering how to interact with that.
I've already got the credentials setup & I'm able to send transactions, but I'm not sure how to sent a transaction to an already existing smart contract & call a function. Any tips on how to do this?
Thanks!

[khaledpac]

You save my life my dear ty veryy much

[str]

I have a question!
Will I be able to cover everything on solidity with this tutorial?
Please someone answer.
And what will be the pre requisites for it?

[hikaru-hokkyokusei]

HI. Your tutorials were amazing.
I started building a project using web3j.
So now i am stuck at a point.
There is a smart contract on testnet. I want to get all the new transactions that are added to this smart contract. I want to check who sent it, to whom it was sent and how many tokens were sent. Can you please teach me how to do this?

[MemoryCardboard]

Thanks for these great tutorials, I'm making a supply chain app for android that uses web3j and I would love you to make the android tutorial you suggested you might. Are there any implications I should be aware of with this? as the only experience I have with any of this is the java language. Subscribed :)

[reacheranderson]

I can see the contract creation on ganache but my java send error message and didn't return any address

[anirudh]

How do you get the web3j client for kovan testnet ? Can you please help me with a sample code for it.

[alibouriga]

thank you very much sir, i have an error Exception in thread "main" Empty value (0x) returned from contract

[susmitjaiswal]

When you generated java class you had functions returning string and transaction receipt object but when I am generating it gives only transaction object returning functions ...what should I do to return data..pls tell

[saichand]

Hi , I got this exception when i used same gas limit you used, also I used various numbers for the gas limit Transaction has failed with status: 0x0"

[ihabhamed]

your tutorial is great but i really can't catching up, it's too complicated even i'm familiar with javascript

[ashishsrivastava]

Hi ! @What's Solidity
Great Tutorial. I am working for a cryptocurrency exchange company, we are going to integrate TrueUSD with our exchange. i am core java developer not have experience with ERC20 coin. can you please help me for understanding how i can integrate ERC20 with our exchnage.