解決：Cannot find System Java Compiler. Ensure that you have installed a JDK (not just a JRE)

導入github上的項目，有時候，就會報如下的錯誤 Error:Execution failed for task ':app:compileDebugJava'. > Cannot find System Java Compiler. Ensure that you have installed a JDK (not just a JRE) and configured your JAVA_HO

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