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How to get all enum values in Java?
... Value : %s ]%n",currency.name(),currency);
}
}
}
http://javaexplorer03.blogspot.in/2015/10/name-and-values-method-of-enum.html
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Best way to create an empty map in Java
...Granted, no big benefits here compared to Collections.emptyMap(). From the Javadoc:
This map behaves and performs comparably to Collections.emptyMap(),
and is preferable mainly for consistency and maintainability of your
code.
2) Map that you can modify:
Maps.newHashMap()
// or:
Maps.<...
How to set a JVM TimeZone Properly
I am trying to run a Java program, but it is taking a default GMT timezone instead of an OS defined timezone. My JDK version is 1.5 and the OS is Windows Server Enterprise (2007)
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how to get the one entry from hashmap without iterating
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If you are using Java 8, it is as simple as findFirst():
Quick example:
Optional<Car> theCarFoundOpt = carMap.values().stream().findFirst();
if(theCarFoundOpt.isPresent()) {
return theCarFoundOpt.get().startEngine();
}
...
How do I rename the android package name? [duplicate]
...r to rename test only. The same applies if I navigate to package name in .java or Manifest file and press Shift+F6.
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How to check if a String contains another String in a case insensitive manner in Java?
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Yes, contains is case sensitive. You can use java.util.regex.Pattern with the CASE_INSENSITIVE flag for case insensitive matching:
Pattern.compile(Pattern.quote(wantedStr), Pattern.CASE_INSENSITIVE).matcher(source).find();
EDIT: If s2 contains regex special character...
java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
I'm using the support library for my app. In my FragmentActivity I'm using an AsyncTask for downloading data from internet. In the onPreExecute() method I add a Fragment and in the onPostExecute() method I remove it again. When the orientation is changed in between, I get the above mentioned excepti...
Junit: splitting integration test and Unit tests
... <configuration>
<excludedGroups>java.io.Serializable</excludedGroups> <!-- An empty element doesn't overwrite, so I'm using an interface here which no one will ever use -->
</configuration>
</plugin&g...
How to convert a char array back to a string?
...t this is a very unusual situation: Because String is handled specially in Java, even "foo" is actually a String. So the need for splitting a String into individual chars and join them back is not required in normal code.
Compare this to C/C++ where "foo" you have a bundle of chars terminated by a ...
Using Mockito's generic “any()” method
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Since Java 8 you can use the argument-less any method and the type argument will get inferred by the compiler:
verify(bar).doStuff(any());
Explanation
The new thing in Java 8 is that the target type of an expression will be u...