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How to make ThreadPoolExecutor's submit() method block if it is saturated?
I want to create a ThreadPoolExecutor such that when it has reached its maximum size and the queue is full, the submit() method blocks when trying to add new tasks. Do I need to implement a custom RejectedExecutionHandler for that or is there an existing way to do this using a standard Java ...
What's the advantage of a Java enum versus a class with public static final fields?
I am very familiar with C# but starting to work more in Java. I expected to learn that enums in Java were basically equivalent to those in C# but apparently this is not the case. Initially I was excited to learn that Java enums could contain multiple pieces of data which seems very advantageous ( ht...
What does “exited with code 9009” mean during this build?
...The command "xcopy.exe /Y C:\projectpath\project.config C:\compilepath\" exited with code 9009.
But in my case it was also intermittent. That is, the error message persists until a restart of the computer, and disappears after a restart of the computer. It is back after some remotely related issue...
What does mvn install in maven exactly do
...provided by Apache which does more than dependency management. We can make it as a peer of Ant and Makefile which downloads all of the dependencies required.
On a mvn install, it frames a dependency tree based on the project configuration pom.xml on all the sub projects under the super pom.xml (the...
How do negative margins in CSS work and why is (margin-top:-5 != margin-bottom:5)?
A common trick for vertical positioning elements is to use the following CSS:
7 Answers
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Is there a performance difference between a for loop and a for-each loop?
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From Item 46 in Effective Java by Joshua Bloch :
The for-each loop, introduced in
release 1.5, gets rid of the clutter
and the opportunity for error by
hiding the iterator or index variable
completely. The resulting id...
How to compare arrays in JavaScript?
...in your code.");
// attach the .equals method to Array's prototype to call it on any array
Array.prototype.equals = function (array) {
// if the other array is a falsy value, return
if (!array)
return false;
// compare lengths - can save a lot of time
if (this.length != arr...
What does the @ symbol before a variable name mean in C#? [duplicate]
I understand that the @ symbol can be used before a string literal to change how the compiler parses the string. But what does it mean when a variable name is prefixed with the @ symbol?
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Commit only part of a file in Git
When I make changes to a file in Git, how can I commit only some of the changes?
23 Answers
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Why is the console window closing immediately once displayed my output?
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the issue here is that their Hello World Program is showing up then it would immediately close.
why is that?
Because it's finished. When console applications have completed executing and return from their main method, the associated console window automatically closes. This is expected be...