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How to activate JMX on my JVM for access with jconsole?

... The relevant documentation can be found here: http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html Start your program with following parameters: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9010 -Dcom.sun.management.jmxremote.rmi.po...
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Spring vs EJB. Can Spring replace EJB? [closed]

...n to support the EJB standard can, in theory, be ported from one compliant Java EE app server to another. But that means staying away from any and all vendor-specific extensions that lock you in to one vendor. Spring ports easily between app servers (e.g., WebLogic, Tomcat, JBOSS, etc.) because it...
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How do I clone a generic List in Java?

... docs.oracle.com/javase/8/docs/api/java/util/… Doesn't work because the list sizes are different. – MLProgrammer-CiM Mar 30 '16 at 17:59 ...
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Java: PrintStream to String?

... Use a ByteArrayOutputStream as a buffer: import java.io.ByteArrayOutputStream; import java.io.PrintStream; import java.nio.charset.StandardCharsets; final ByteArrayOutputStream baos = new ByteArrayOutputStream(); final String utf8 = StandardCharsets.UTF_8.name(); ...
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How do I use a custom Serializer with Jackson?

I have two Java classes that I want to serialize to JSON using Jackson: 11 Answers 11 ...
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How to use Comparator in Java to sort

....format("{name=%s, age=%d}", name, age); } } EDIT And an equivalent Java 8 demo would look like this: public class ComparatorDemo { public static void main(String[] args) { List<Person> people = Arrays.asList( new Person("Joe", 24), new Pers...
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Why is super.super.method(); not allowed in Java?

...e cases, perhaps you could overcome inor's objection with dynamic proxies (javahowto.blogspot.co.uk/2011/12/…), redirecting method calls to the original object (synchronizing variables after each call)? It seems that proxies require everything to be implementing an interface, though. Also, I won...
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Is there anything like .NET's NotImplementedException in Java?

Is there anything like .NET's NotImplementedException in Java? 5 Answers 5 ...
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Does Java have a complete enum for HTTP response codes?

I'm wondering if there is an enum type in some standard Java class library that defines symbolic constants for all of the valid HTTP response codes. It should support conversion to/from the corresponding integer values. ...
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Abstract class in Java

What is an "abstract class" in Java? 14 Answers 14 ...