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What is difference between CrudRepository and JpaRepository interfaces in Spring Data JPA?
What is the difference between CrudRepository and JpaRepository interfaces in Spring Data JPA ?
6 Answers
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Is SecureRandom thread safe?
Is SecureRandom thread safe? That is, after initializing it, can access to the next random number be relied on to be thread safe? Examining the source code seems to show that it is, and this bug report seems to indicate that its lack of documentation as thread safe is a javadoc issue. Has anyone...
LINQ .Any VS .Exists - What's the difference?
Using LINQ on collections, what is the difference between the following lines of code?
6 Answers
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JUnit test for System.out.println()
...eed to write JUnit tests for an old application that's poorly designed and is writing a lot of error messages to standard output. When the getResponse(String request) method behaves correctly it returns a XML response:
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Check if object exists in JavaScript
How do I verify the existence of an object in JavaScript?
18 Answers
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Running code in main thread from another thread
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NOTE: This answer has gotten so much attention, that I need to update it. Since the original answer was posted, the comment from @dzeikei has gotten almost as much attention as the original answer. So here are 2 possible solutions:
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How do I truncate a .NET string?
I would like to truncate a string such that its length is not longer than a given value. I am writing to a database table and want to ensure that the values I write meet the constraint of the column's datatype.
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All possible array initialization syntaxes
...lated array of length 2
Note that other techniques of obtaining arrays exist, such as the Linq ToArray() extensions on IEnumerable<T>.
Also note that in the declarations above, the first two could replace the string[] on the left with var (C# 3+), as the information on the right is enough t...
How to check if a char is equal to an empty space?
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if (c == ' ')
char is a primitive data type, so it can be compared with ==.
Also, by using double quotes you create String constant (" "), while with single quotes it's a char constant (' ').
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Where is Java Installed on Mac OS X?
...r/libexec/java_home -v 1.8 command on a terminal shell to figure out where is your Java 1.8 home directory
If you just want to find out the home directory of your most recent version of Java, omit the version. e.g. /usr/libexec/java_home
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