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Lightweight Java Object cache API [closed]
I'm looking for a Java in-memory object caching API. Any recommendations? What solutions have you used in the past?
7 Answe...
How to generate serial version UID in Intellij
...ar settings)
File -> Settings -> Editor -> Inspections -> Java -> Serialization issues -> Serializable class without 'serialVersionUID' - set flag and click 'OK'.
(For Macs, Settings is under IntelliJ IDEA -> Preferences...)
Now, if your class implements Serializable, y...
What could cause java.lang.reflect.InvocationTargetException?
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From the Javadoc of Method.invoke()
Throws: InvocationTargetException - if the underlying method throws an exception.
This exception is thrown if the method called threw an exception.
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Avoid synchronized(this) in Java?
Whenever a question pops up on SO about Java synchronization, some people are very eager to point out that synchronized(this) should be avoided. Instead, they claim, a lock on a private reference is to be preferred.
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How to use Class in Java?
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All we know is "All instances of a any class shares the same java.lang.Class object of that type of class"
e.g)
Student a = new Student();
Student b = new Student();
Then a.getClass() == b.getClass() is true.
Now assume
Teacher t = new Teacher();
without generics the below is...
Using Application context everywhere?
...ntln("x:"+Y.xinstance+" y:"+X.yinstance);
}
}
Let's run the code:
$ javac A.java
$ java A
x:X@a63599 y:Y@9036e
x:null y:null
The second line shows that Y.xinstance and X.yinstance are null; they are null because the variables X.xinstance ans Y.yinstance were read when they were null.
Can ...
Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
... please refer to our site mboot.herokuapp.com, we publish article related java - spring-boot
– Salah Atwa
Jun 21 at 22:08
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How do I make the method return type generic?
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I don't disagree about that, but we are dealing with Java and all of its design decisions/foibles. I see this question as just trying to learn what is possible in Java generics, not as an xyproblem (meta.stackexchange.com/questions/66377/what-is-the-xy-problem) that needs to be...
Assign variable in if condition statement, good practice or not? [closed]
I moved one years ago from classic OO languages such like Java to JavaScript. The following code is definitely not recommended (or even not correct) in Java:
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Difference between class and type
Being new to Java, I'm confused between the concepts of class and type .
For example, should the object "Hello World!" belong to the type String or class String ? Or maybe both?
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