Question

C：\ Users \ 1636820 \ Downloads \ web3j-3.4.0 \ web3j-3.4.0 \ bin>创建web3j钱包

             _      _____ _     _
            | |    |____ (_)   (_)
__      _____| |__      / /_     _   ___
 \ /\ / / _ \ '_ \     \ \ |   | | / _ \
 \ V  V /  __/ |_) |.___/ / | _ | || (_) |
  \_/\_/ \___|_.__/ \____/| |(_)|_| \___/
                         _/ |
                         |__/

Please enter a wallet file password:
 re-enter the password:
Please enter a destination directory location 
[C:\Users\1636820\AppData\Roaming\Ethereum\testnet\keystore]: 
C:\Users\1636820\Downloads\web3j-3.4.0\web3j-3.4.0\bin
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at org.bouncycastle.util.Arrays.clone(Unknown Source)
    at org.bouncycastle.crypto.generators.SCrypt.SMix(Unknown Source)
    at org.bouncycastle.crypto.generators.SCrypt.MFcrypt(Unknown Source)
    at org.bouncycastle.crypto.generators.SCrypt.generate(Unknown Source)
    at org.web3j.crypto.Wallet.generateDerivedScryptKey(Wallet.java:132)
    at org.web3j.crypto.Wallet.create(Wallet.java:70)
    at org.web3j.crypto.Wallet.createStandard(Wallet.java:89)
    at org.web3j.crypto.WalletUtils.generateWalletFile(WalletUtils.java:65)
    at 
org.web3j.crypto.WalletUtils.generateNewWalletFile(WalletUtils.java:56)
    at 
org.web3j.crypto.WalletUtils.generateFullNewWalletFile(WalletUtils.java:40)
    at org.web3j.console.WalletCreator.run(WalletCreator.java:39)
    at org.web3j.console.WalletCreator.main(WalletCreator.java:26)
    at org.web3j.console.WalletRunner.main(WalletRunner.java:23)
    at org.web3j.console.WalletRunner.run(WalletRunner.java:14)
    at org.web3j.console.Runner.main(Runner.java:35)

C：\ Users \ 1636820 \ Downloads \ web3j-3.4.0 \ web3j-3.4.0 \ bin>

如何解决此问题以及在哪里保存钱包文件？

Answer 1

问题就在这里，除了：

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

在32位系统上，您可以增加到4GB。如果您使用的是64位系统，则可以更高。不用担心您选择错误，如果您在32位系统上要求5g，则Java会抱怨值无效并退出。

如其他人所发布的，请使用cmd-line标志-例如

java -Xmx6g myprogram   您可以通过键入java -X来获得完整列表（或者无论如何都接近完整列表）。

来源：https://stackoverflow.com/a/1566026/3374428

您可以尝试使用以下替代解决方案：https://lhalcyon.com/blockchain-eth-unlock-android/

在web3j中创建钱包时如何解决异常？

1 个答案: