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JEP 229 may affect code that uses keystores. It changes the default keystore type from JKS to PKCS12. By default, new keystores will be created in the PKCS12 keystore format. Existing keystores will not change and keystore applications can continue to explicitly specify the keystore type they require. 

Encapsulate Most Internal APIs

JEP 260 may affect code that uses JDK internal APIs. It makes most of the JDK's internal APIs inaccessible by default, leaving a few critical, widely-used internal APIs accessible, until supported replacements exist for all or most of their functionality.

HarfBuzz Font-Layout Engine

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