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Java Hashmap: How to get key from value?
... you choose to use the Commons Collections library instead of the standard Java Collections API, you can achieve this with ease.
The BidiMap interface in the Collections library is a bi-directional map, allowing you to map a key to a value (like normal maps), and also to map a value to a key, thus ...
JPanel Padding in Java
I have a formatting question for my Java swing application. It should be fairly straightforward, but I am having difficulty finding any aid (Every topic seems to be regarding removing any default padding in JPanel). The text in my various JPanels hug the sides and top, touching the colored borders...
Map to String in Java
When I do System.out.println(map) in Java, I get a nice output in stdout. How can I obtain this same string representation of a Map in a variable without meddling with standard output? Something like String mapAsString = Collections.toString(map) ?
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How to format a Java string with leading zero?
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You can use StringUtils or DecimalFormat for Java 1.4 and below. Check here javadevnotes.com/java-integer-to-string-with-leading-zeros
– JavaDev
Mar 5 '15 at 3:40
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EJB's - when to use Remote and/or local interfaces?
I'm very new to Java EE and I'm trying to understand the concept of Local interfaces and Remote interfaces. I've been told that one of the big advantages of Java EE is that it is easy to scale (which I believe means you can deploy different components on different servers). Is that where Remote and ...
Java HashMap performance optimization / alternative
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Just use java.util.Arrays.hashCode(). It's simpler (no code to write and maintain by yourself), its calculation is probably faster (fewer multiplications), and the distribution of its hash codes will probably be more even.
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JavaScript OOP in NodeJS: how?
I am used to the classical OOP as in Java.
6 Answers
6
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How can I use external JARs in an Android project?
...r Eclipse
A good way to add external JARs to your Android project or any Java project is:
Create a folder called libs in your project's root folder
Copy your JAR files to the libs folder
Now right click on the Jar file and then select Build Path > Add to Build
Path, which will create a folder...
C++ equivalent of java's instanceof
What is the preferred method to achieve the C++ equivalent of java's instanceof ?
6 Answers
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