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Spring RestTemplate timeout
... The above code doesn't work in latest Spring. It gives ClassCastException java.lang.ClassCastException: org.springframework.http.client.InterceptingClientHttpRequestFactory cannot be cast to org.springframework.http.client.HttpComponentsClientHttpRequestFactory
– comiventor
...
Lambda Expression and generic method
... tell such a lambda expression with type parameters apart from other legal Java constructs. Thus you have to resort to method references. The target method can declare type parameters using an established syntax.
– Holger
Dec 16 '15 at 10:48
...
What is a good use case for static import of methods?
...y one or two members, import them individually.
(https://docs.oracle.com/javase/8/docs/technotes/guides/language/static-import.html)
There are two parts I want to call out specifically:
Use static imports only when you were tempted to "abuse inheritance". In this case, would you have been tempt...
How to get the insert ID in JDBC?
...ord in a database (which is Microsoft SQL Server in my case) using JDBC in Java. At the same time, I want to obtain the insert ID. How can I achieve this using JDBC API?
...
How to handle :java.util.concurrent.TimeoutException: android.os.BinderProxy.finalize() timed out af
...hard coded timeout value of 10 seconds,
if timeout has reached - throw the java.util.concurrent.TimeoutException and kill the process.
Now consider the following scenario:
Application runs along doing its thing.
This is not a user facing application, it runs in the background.
During this backg...
Use String.split() with multiple delimiters
...acter in regex means any character other than new line. tutorialspoint.com/java/java_regular_expressions.htm In this case, however, they wanted the actual character .. The two backslashes indicate that you are referring to .. The backslash is an escape character.
– Monkeygrinde...
How to know if other threads have finished?
...eption when it completes, or
Use locks or synchronizers or mechanisms from java.util.concurrent, or
More orthodox, create a listener in your main Thread, and then program each of your Threads to tell the listener that they have completed.
How to implement Idea #5? Well, one way is to first create...
How to insert a character in a string at a certain position?
...bly a faster implementation than using a StringBuffer. As mentioned in the Java docs:
This class provides an API compatible with StringBuffer, but with no guarantee of synchronization. This class is designed for use as a drop-in replacement for StringBuffer in places where the string buffer was...
SparseArray vs HashMap
...ted on heap by JVM.
They may vary depending on the specific JVM used.
The java.lang.instrument package contains some helpful methods for advanced operations like checking the size of an object with getObjectSize(Object objectToSize).
Extra info is available from the official Oracle documentation....
Which @NotNull Java annotation should I use?
... would like to avoid any reference to IDE, framework or any toolkit except Java itself.
This rules out:
android.support.annotation
edu.umd.cs.findbugs.annotations
org.eclipse.jdt.annotation
org.jetbrains.annotations
org.checkerframework.checker.nullness.qual
lombok.NonNull
Which leaves us with ...