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How does Java handle integer underflows and overflows and how would you check for it?
How does Java handle integer underflows and overflows?
12 Answers
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How to use a wildcard in the classpath to add multiple jars? [duplicate]
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From: http://java.sun.com/javase/6/docs/technotes/tools/windows/classpath.html
Class path entries can contain the basename wildcard character *, which is considered equivalent to specifying a list of all the files in the directory wit...
Open Source Java Profilers [closed]
What can you guys recommend to use with Java?
12 Answers
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Regular expression for floating point numbers
.... and [0-9] instead of \d to avoid escaping issues in some languages (like Java).
Thanks to the nameless one for originally recognizing this.
One relatively simple pattern for matching a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working exampl...
Java 8 Streams: multiple filters vs. complex condition
...E: tests runs on
8 CPU
1 GB RAM
OS version: 16.04.1 LTS (Xenial Xerus)
java version: 1.8.0_121
jvm: -XX:+UseG1GC -server -Xmx1024m -Xms1024m
UPDATE:
Java 11 has some progress on the performance, but the dynamics stay the same
Benchmark mode: Throughput, ops/time
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Choosing the best concurrency list in Java [closed]
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had better be List
The only List implementation in java.util.concurrent is CopyOnWriteArrayList. There's also the option of a synchronized list as Travis Webb mentions.
That said, are you sure you need it to be a List? There are a lot more options for concurrent Queues and M...
How to represent empty char in Java Character class
I want to represent an empty character in Java as "" in String...
15 Answers
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Jackson: how to prevent field serialization
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transient is the solution for me. thanks! it's native to Java and avoids you to add another framework-specific annotation.
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error: ‘NULL’ was not declared in this scope
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God, I am so spoiled with Java (null being a keyword) that I never thought that NULL would not be a keyword in c++. Thanks :)
– Stefan Hendriks
Oct 4 '11 at 19:45
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Java: getMinutes and getHours
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Try using Joda Time instead of standard java.util.Date classes. Joda Time library has much better API for handling dates.
DateTime dt = new DateTime(); // current time
int month = dt.getMonth(); // gets the current month
int hours = dt.getHourOfDay(); // gets...