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How do you find out when a Java class was introduced to the Standard Java API?

您如何查找将Java类引入标准Java API的时间?

The javadoc will have a Since tagline, for instance on java.util.List :

Since

1.2

http://docs.oracle.com/javase/8/docs/api/java/util/List.html

Therefore it has been around since Java 1.2 (Java J2SE 1.2)

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