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How do I join two lists in Java?
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In Java 8:
List<String> newList = Stream.concat(listOne.stream(), listTwo.stream())
.collect(Collectors.toList());
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Java String - See if a string contains only numbers and not letters
I have a string that I load throughout my application, and it changes from numbers to letters and such. I have a simple if statement to see if it contains letters or numbers but, something isn't quite working correctly. Here is a snippet.
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Using Regex to generate Strings rather than match them
I am writing a Java utility which helps me to generate loads of data for performance testing. It would be really cool to be able to specify a regex for Strings so that my generator spits out things which match this. Is there something out there already baked which I can use to do this? Or is th...
Clone() vs Copy constructor- which is recommended in java [duplicate]
clone method vs copy constructor in java. which one is correct solution. where to use each case?
6 Answers
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Where does Java's String constant pool live, the heap or the stack?
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The answer is technically neither. According to the Java Virtual Machine Specification, the area for storing string literals is in the runtime constant pool. The runtime constant pool memory area is allocated on a per-class or per-interface basis, so it's not tied to any obje...
java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
...k right the file "add as library" 3. check your import statements in your .java-files.
– Martin Pfeffer
Apr 2 '17 at 12:06
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Calling clojure from java
Most of the top google hits for "calling clojure from java" are outdated and recommend using clojure.lang.RT to compile the source code. Could you help with a clear explanation of how to call Clojure from Java assuming you have already built a jar from the Clojure project and included it in the cl...
Instantiating object of type parameter
...odException` to be compiled. Your answer is unfortunately not friendly to Java beginner.
– purucat
Sep 12 '16 at 2:45
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How to serialize a lambda?
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Java 8 introduces the possibility to cast an object to an intersection of types by adding multiple bounds. In the case of serialization, it is therefore possible to write:
Runnable r = (Runnable & Serializable)() -> S...
Is it possible dynamically to add String to String.xml in Android?
... formatting, see: developer.android.com/reference/android/content/res/…, java.lang.Object...)
– Arnaud
Oct 24 '12 at 11:01
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