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Useful example of a shutdown hook in Java?
I'm trying to make sure my Java application takes reasonable steps to be robust, and part of that involves shutting down gracefully. I am reading about shutdown hooks and I don't actually get how to make use of them in practice.
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Why doesn't C++ have a garbage collector?
...nherent incompatibility between threading/forking and garbage collection. Java and C# both have high performance preemptive multithreading and and a garbage collector. There are issues to do with realtime applications and a garbage collector, as most garbage collectors have to stop the world to ru...
Removing whitespace from strings in Java
...string is not modified as some of the answers sort of imply.
(Experienced Java developers might say "of course, you can't actually modify a String", but the target audience for this question may well not know this.)
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Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile
...t;JRE System Library -->Environments--> Installed JREs-->Point to java folder in c: drive (Windows) and select JDK folder and ok.
2.Remove the already present JRE from build path.
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java.lang.RuntimeException: Unable to instantiate activity ComponentInfo
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There is another way to get an java.lang.RuntimeException: Unable to instantiate activity ComponentInfo exception and that is the activity that you are trying to start is abstract. I made this stupid mistake once and its very easy to overlook.
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How to remove single character from a String
For accessing individual characters of a String in Java, we have String.charAt(2) . Is there any inbuilt function to remove an individual character of a String in java?
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What issues should be considered when overriding equals and hashCode in Java?
...ory (for the language lawyers and the mathematically inclined):
equals() (javadoc) must define an equivalence relation (it must be reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are not modified, then it must keep returning the same value). Furthermore, o....
What is the simplest way to convert a Java string from all caps (words separated by underscores) to
...h says it all. What's the simplest/most elegant way that I can convert, in Java, a string from the format "THIS_IS_AN_EXAMPLE_STRING" to the format " ThisIsAnExampleString "? I figure there must be at least one way to do it using String.replaceAll() and a regex.
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Why does (i
I have written a piece of Java code which is running in an infinite loop.
10 Answers
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使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...board 的 MITVRHelper 应用程序
支持 Expeditions：PanoramaActivity.java
支持 Virtuality：VirtualActivity.java
结论：下一步
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使用虚拟现实和App Inventor进行实验
该项目是麻省理工学院 App Inventor 2011 年 Google Summer of Code 活动的一部...