compile solidity error

[kworldljd]

download solc and put in the root directory of project .
then command run grandlew.bat build then show error:
Error: Source file requires different compiler version (current compiler is 0.5.10+commit.5a6ea5b1.Windows.msvc - note that nightly builds are considered to be strictly less than the released version
pragma solidity ^0.4.25;

change the pragma solidity >0.4.25 then get more errors.
please update solidity file.

[xaviarias]

Hi, the contract Greeter provided in this project has to be compiled with Solidity version 0.4.25.

If you install solc in version 5 the contract won't compile. We will update the samples to use the last version of the web3j plugin so you don't need to install solc and use the bundled one.

If you want to do it yourself you can change version 4.1.2 to 4.1.3 in the plugins section of the Gradle build file:

plugins {
    id 'java'
    id 'org.web3j' version '4.1.3'
}

[kworldljd]

Hi, the contract Greeter provided in this project has to be compiled with Solidity version 0.4.25.

If you install solc in version 5 the contract won't compile. We will update the samples to use the last version of the web3j plugin so you don't need to install solc and use the bundled one.

If you want to do it yourself you can change version 4.1.2 to 4.1.3 in the plugins section of the Gradle build file:

plugins {
    id 'java'
    id 'org.web3j' version '4.1.3'
}

Thank you for your answer!
Before you reply, I modify the greeter.sol file and make it can be compiled by solc 5.
then make java wrapper greeter.java follow the document by hand.
I fix the Application.java to connect testnet Rinkeby, and get the wallet address balance. It looks well according to the log info ,But when call Transfer.sendfunds ,it's timeout. there are not more details .why can't send? what is the problem? how to check and fix. thank you very much !
------------------sendfunds:
TransactionReceipt transferReceipt = Transfer.sendFunds(
web3j, credentials,
"0x76BE1022Afa6375E6D30BAD7a6Eae4ACC4D197B6", // you can put any address here
BigDecimal.ONE, Convert.Unit.WEI) // 1 wei = 10^-18 Ether
.send();

----------------------log
23:34:22.743 [main] INFO org.web3j.sample.Application - Connected to Ethereum client version: Geth/v1.8.25-omnibus-c41559d0/linux-amd64/go1.11.1
23:34:25.230 [main] INFO org.web3j.sample.Application - Credentials loaded
23:34:25.499 [main] INFO org.web3j.sample.Application - address 0xaf5120e13dfe8ec8a5f42fd279d499786229b2e1 balance : 1463371227999999991
23:34:25.503 [main] INFO org.web3j.sample.Application - Sending 1 Wei (0.000000000000000001 Ether)

---------------errors:
Exception in thread "main" org.web3j.protocol.exceptions.TransactionException: Transaction receipt was not generated after 600 seconds for transaction: 0x8bd1520cdc9f73c9a24a43292b8469f0fd0bde7028ec6609260bf2ca2342c559
at org.web3j.tx.response.PollingTransactionReceiptProcessor.getTransactionReceipt(PollingTransactionReceiptProcessor.java:51)
at org.web3j.tx.response.PollingTransactionReceiptProcessor.waitForTransactionReceipt(PollingTransactionReceiptProcessor.java:29)
at org.web3j.tx.TransactionManager.processResponse(TransactionManager.java:72)
at org.web3j.tx.TransactionManager.executeTransaction(TransactionManager.java:51)
at org.web3j.tx.ManagedTransaction.send(ManagedTransaction.java:87)
at org.web3j.tx.Transfer.send(Transfer.java:65)
at org.web3j.tx.Transfer.send(Transfer.java:49)
at org.web3j.tx.Transfer.lambda$sendFunds$0(Transfer.java:76)
at org.web3j.protocol.core.RemoteCall.send(RemoteCall.java:30)
at org.web3j.sample.Application.run(Application.java:82)
at org.web3j.sample.Application.main(Application.java:54)