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Java ArrayList copy
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nowhere in java-api deep cloning is done by any collection class
– Vikash
May 5 '18 at 15:46
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Extract digits from a string in Java
I have a Java String object. I need to extract only digits from it. I'll give an example:
14 Answers
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addEventListener vs onclick
... Chris BakerChris Baker
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How can I convert ArrayList to ArrayList?
...g(object, null))
.collect(Collectors.toList());
Or when you're not on Java 8 yet:
List<String> strings = new ArrayList<>(list.size());
for (Object object : list) {
strings.add(Objects.toString(object, null));
}
Or when you're not on Java 7 yet:
List<String> strings = n...
Managing constructors with many parameters in Java
...llowing of this Josh Bloch presentation (PDF), or this review of Effective Java
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Most efficient way to store thousand telephone numbers
... result is 32 + 999 * (1 + 7) + variable(0..782) bits = 1003 + variable(0..98) bytes.
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Difference between volatile and synchronized in Java
...tile and always accessing the variable in a synchronized(this) block in Java?
4 Answers
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Effect of a Bitwise Operator on a Boolean in Java
... behaviour in the latter case is specified. See the section 15.22.2 of the Java Language Specification for details.
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Handling exceptions from Java ExecutorService tasks
I'm trying to use Java's ThreadPoolExecutor class to run a large number of heavy weight tasks with a fixed number of threads. Each of the tasks has many places during which it may fail due to exceptions.
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How to set JVM parameters for Junit Unit Tests?
...For the rest - you must remember that JUnit test cases are just a bunch of Java classes, not a standalone program. It is up to the runner (let it be a standalone JUnit runner, your IDE, maven-surefire-plugin to set those options. That being said there is no "portable" way to set them, so that memory...