Getting contract binary using web3j

Question

I'm using web3J library in my java app. I got an address of a deployed contract and would like to get it's binary or abi from the blockchain using my java app, how can I do that?

Answer 1

here is how to read the bytecode using web3j:

    EthGetCode ethGetCode = web3j.ethGetCode("0x248b73642eab74b3cfb32f5ecd0ff1a12a5e6a4f",DefaultBlockParameterName.LATEST).send();
    String s=ethGetCode.getCode();
    System.out.println(s);

for the ABI you can't read it from the blockchain but you have to generate it from the code if you have it.