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How to convert jsonString to JSONObject in Java
...fore choosing. See this benchmark I did using JMH: github.com/fabienrenaud/java-json-benchmark It clearly shows jackson faster than anything else and 5 to 6 times faster than org.json.
– fabien
Jun 27 '16 at 20:47
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What is the point of “final class” in Java?
I am reading a book about Java and it says that you can declare the whole class as final . I cannot think of anything where I'd use this.
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Hash String via SHA-256 in Java
... other freely available utility) to generate a SHA-256 Hash of a String in Java. Looking at their documentation I can't seem to find any good examples of what I want to do. Can anybody here help me out?
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How to append text to an existing file in Java?
I need to append text repeatedly to an existing file in Java. How do I do that?
31 Answers
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What actually causes a Stack Overflow error? [duplicate]
... everywhere and can't find a solid answer. According to the documentation, Java throws a java.lang.StackOverflowError error under the following circumstance:
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Developing for Android in Eclipse: R.java not regenerating
I've found out that my R.java is never updated, so it doesn't contain information about my new resources, so I decided to delete it and thought that Eclipse would generate a new one. But that didn't happen, and I don't have R.java now. How can I regenerate one?
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Mercurial: how to amend the last commit?
...r reorder some. If your last revision is 99, you may just use hg qimport -r98:tip; hg qpop; [edit series file]; hg qpush -a; hg qfinish -a.
Of course, this procedure is highly discouraged and risky. Make a backup of everything before you do this!
As a sidenote, I've done it zillions of times on pr...
What are the key differences between Scala and Groovy? [closed]
...languages for the JVM that have lambdas and closures and interoperate with Java. Other than that, they're extremely different.
Groovy is a "dynamic" language in not only the sense that it is dynamically typed but that it supports dynamic meta-programming.
Scala is a "static" language in that it i...
A KeyValuePair in Java [duplicate]
I'm looking for a KeyValuePair class in Java.
Since java.util heavily uses interfaces there is no concrete implementation provided, only the Map.Entry interface.
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Can overridden methods differ in return type?
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Java supports* covariant return types for overridden methods. This means an overridden method may have a more specific return type. That is, as long as the new return type is assignable to the return type of the method you ar...