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Initialize class fields in constructor or at declaration?
... programming in C# and Java recently and I am curious where the best place is to initialize my class fields.
15 Answers
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What is a serialVersionUID and why should I use it?
Eclipse issues warnings when a serialVersionUID is missing.
26 Answers
26
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What is a build tool?
For past 4 years, I have been programming with Eclipse (for Java), and Visual Studio Express (for C#). The IDEs mentioned always seemed to provide every facility a programmer might ask for (related to programming, of course).
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Best implementation for hashCode method for a collection
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The best implementation? That is a hard question because it depends on the usage pattern.
A for nearly all cases reasonable good implementation was proposed in Josh Bloch's Effective Java in Item 8 (second edition). The best thing is to look it up there...
Is cout synchronized/thread-safe?
In general I assume that streams are not synchronized, it is up to the user to do appropriate locking. However, do things like cout get special treatment in the standard library?
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What is the meaning of the term arena in relation to memory?
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An arena is just a large, contiguous piece of memory that you allocate once and then use to manage memory manually by handing out parts of that memory. For example:
char * arena = malloc(HUGE_NUMBER);
unsigned int current = 0;
void...
Design patterns to avoid [closed]
...nd some even suggest avoiding the pattern entirely. There's an excellent discussion here . Please direct any comments about the Singleton pattern to that question.
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Transaction isolation levels relation with locks on table
I have read about 4 levels of isolation:
3 Answers
3
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Core dumped, but core file is not in the current directory?
...rc/linux/Documentation/sysctl/kernel.txt.
[/proc/sys/kernel/]core_pattern is used to specify a core dumpfile pattern name.
If the first character of the pattern is a '|', the kernel will treat
the rest of the pattern as a command to run. The core dump will be
written to the standard input of that...
Should methods in a Java interface be declared with or without a public access modifier?
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The JLS makes this clear:
It is permitted, but discouraged as a matter of style, to redundantly specify the public and/or abstract modifier for a method declared in an interface.
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