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Is it wrong to use Deprecated methods or classes in Java?
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1. Is it wrong to use Deprecated methods or classes in Java?
From the definition of deprecated:
A program element annotated @Deprecated is one that programmers are discouraged from using, typically because it is dangerous, or because a better alternative exists.
The metho...
Do subclasses inherit private fields?
...fferent than the notion of inheritance for a class. As is the case in the java world, where there is a question of semantics the arbiter is the Java Language Specification (currently 3rd edition).
As the JLS states (https://docs.oracle.com/javase/specs/jls/se8/html/jls-8.html#jls-8.2):
Membe...
When is the finalize() method called in Java?
...est not to rely on finalize() to do any cleaning up etc.
According to the Javadoc (which it would be worth reading), it is:
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
As Joachim pointed out, this may never h...
console.writeline and System.out.println
...m.out.println("Console is: " + System.console());
}
}
results in:
$ java ConsoleTest
Console is: java.io.Console@2747ee05
$ java ConsoleTest </dev/null
Console is: null
$ java ConsoleTest | cat
Console is: null
The reason Console exists is to provide features that are useful in the speci...
Java Enum definition
I thought I understood Java generics pretty well, but then I came across the following in java.lang.Enum:
7 Answers
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Force point (“.”) as decimal separator in java
...nswer to the question and beside as programmer this is what I want. I want Java to use US locale by default as everywhere in my code where I actually need localisation I will make it explicit in my code. Just my habits perhaps but it is very annoying when printf/format uses my local Locale cause the...
What is the best way to tell if a character is a letter or number in Java without using regexes?
...way to recognize if a string.charAt(index) is an A-z letter or a number in Java without using regular expressions? Thanks.
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How to avoid java.util.ConcurrentModificationException when iterating through and removing elements
...er it I have to remove elements at the same time. Obviously this throws a java.util.ConcurrentModificationException .
20 A...
The split() method in Java does not work on a dot (.) [duplicate]
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java.lang.String.split splits on regular expressions, and . in a regular expression means "any character".
Try temp.split("\\.").
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Convert Java Object to JsonNode in Jackson [duplicate]
Is it possible to directly convert a Java Object to an JsonNode-Object?
1 Answer
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