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《Differences Between Oracle JDK and OpenJDK》https://www.baeldung.com/oracle-jdk-vs-openjdk
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https://github.com/TGspace/JavaGuide/blob/main/docs/java/basis/java-basic-questions-01.md#java-语言关键字有哪些
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https://stackoverflow.com/questions/1906445/what-is-the-difference-between-jdk-and-jrehttps://stackoverflow.com/questions/1906445/what-is-the-difference-between-jdk-and-jre
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