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Java: recommended solution for deep cloning/copying an instance
...t hierarchy):
commons-lang SerializationUtils - using serialization - if all classes are in your control and you can force implementing Serializable.
Java Deep Cloning Library - using reflection - in cases when the classes or the objects you want to clone are out of your control (a 3rd party libra...
How do I make JavaScript beep?
...h="0" height="0" id="sound1"
enablejavascript="true">
You would then call it from JavaScript code as such:
PlaySound("sound1");
This should do exactly what you want - you'll just need to find/create the beep sound yourself, which should be trivial.
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What is the difference between 'java', 'javaw', and 'javaws'?
...ava Applet Viewer, JNLP and Java Web Start, including the javaws tool, are all deprecated in JDK 9 and will be removed in a future release.
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Java 8: How do I work with exception throwing methods in streams?
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You need to wrap your method call into another one, where you do not throw checked exceptions. You can still throw anything that is a subclass of RuntimeException.
A normal wrapping idiom is something like:
private void safeFoo(final A a) {
try {
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Understanding Canvas and Surface concepts
...nders these to the final display in their correct Z-order. A surface typically has more than one buffer (usually two) to do double-buffered rendering: the application can be drawing its next UI state while the surface flinger is compositing the screen using the last buffer, without needing to wait ...
Why is spawning threads in Java EE container discouraged?
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It is discouraged because all resources within the environment are meant to be managed, and potentially monitored, by the server. Also, much of the context in which a thread is being used is typically attached to the thread of execution itself. If y...
Twitter image encoding challenge [closed]
... 4 = 64 colors) that simply gets blended in in some proportion. Mathematically, this is equivalent to a variable brightness and constant contrast adjustment for each color. Unfortunately, it also means there's no negative contrast to flip the colors.
Once it's computed the position, orientation a...
Is there a command like “watch” or “inotifywait” on the Mac?
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fswatch
fswatch is a small program using the Mac OS X FSEvents API to monitor a directory.
When an event about any change to that directory is received, the specified
shell command is executed by /bin/bash
If you're on GNU/Linux,
inotifywatch (par...
Simple Getter/Setter comments
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I usually just fill the param part for setters, and the @return part for getters:
/**
*
* @param salary salary to set (in cents)
*/
public void setSalary(float salary);
/**
* @return current salary (in cents, may be imagin...
How to initialize all members of an array to the same value?
... array in C (not C++ if that makes a difference). I want to initialize all members of the same value.
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