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java.security.cert.CertificateException: Certificates does not conform to algorithm constraints

	*  java.security.cert.CertificateException: Certificates does not conform to algorithm constraints 예외 발생
	*  Arrrggh! java.security.cert.CertificateException: Certificates does not conform to algorithm constraints : Pragmatic Coder - Java, Wicket and the Web
	*  JDK 7 부터 MD2,</description>
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NIO. 2 에 파일 관련 각종 API가 추가되었다. 이전보다 더 쉽게 파일 관련 작업을 수행할 수 있다.

File I/O (Featuring NIO.2) (The Java™ Tutorials &gt; Essential Classes &gt; Basic I/O) 에서 자세히 볼 수 있으며 아래는 간단한 정리이다..

	*  Creating, Writing, Reading files using Java Files API of Java 7

Path

파일의 경로는 java.nio.file.Path 인터페이스로 나타낸다. 기존의</description>
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Java 7 에서는 Security 관련 변경사항이 많다.

* Java 7 Compatibility

Sorting Algorithm 변경

	*  Sort algorithm changes in Java 7 | tOMPSON's blog
	*  Comparator 구현시 1, 0, -1을 정확히 리턴해주게 작성할 것.

private class

	*  Freemarker에서 private class의 인스턴스를 읽지 못한다. public으로 변경해야 한다.</description>
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