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Why switch is faster than if
Lots of Java books describe the switch statement as being faster than the if else statement. But I did not find out anywhere why switch is faster than if .
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HttpURLConnection timeout settings
... the URL takes more then 5 seconds to connect - how is this possible using Java? Here is the code I am using to check if the URL is valid
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Current time in microseconds in java
...stem, is there a way to get a timestamp with microsecond level accuracy in Java? Something like C's gettimeofday function.
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How to deal with a slow SecureRandom generator?
If you want a cryptographically strong random numbers in Java, you use SecureRandom . Unfortunately, SecureRandom can be very slow. If it uses /dev/random on Linux, it can block waiting for sufficient entropy to build up. How do you avoid the performance penalty?
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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 configure MongoDB Java driver MongoOptions for production use?
...eb looking for best practices for configuring MongoOptions for the MongoDB Java driver and I haven't come up with much other than the API. This search started after I ran into the "com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db
connection" error and by increasing the connections/...
How to write logs in text file when using java.util.logging.Logger
...hrough logging.properties file. And it can be passed as JVM parameter ex : java -Djava.util.logging.config.file=/scratch/user/config/logging.properties
Details: https://docs.oracle.com/cd/E23549_01/doc.1111/e14568/handler.htm
Configuring the File handler
To send logs to a file, add FileHandler to...
Implementing two interfaces in a class with same method. Which interface method is overridden?
... BTW This changes a little with the support of default methods in Java 8.
– Peter Lawrey
Jun 25 '14 at 6:06
C...
What is the equivalent of “android:fontFamily=”sans-serif-light" in Java code?
...nt.myfont)
textView.typeface = typeface
Option 2 - API 16 and higher
// Java
Typeface typeface = ResourcesCompat.getFont(context, R.font.myfont);
// Kotlin
val typeface = ResourcesCompat.getFont(context, R.font.myfont)
Check the full expiation at Android Developers Guide.
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Openssl is not recognized as an internal or external command
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This is worked for me successfully.
"C:\Program Files\Java\jdk1.6.0_26\bin\keytool.exe" -exportcert -alias sociallisting -keystore "D:\keystore\SocialListing" | "C:\cygwin\bin\openssl.exe" sha1 -binary | "C:\cygwin\bin\openssl.exe" base64
Be careful with below path :
"C:\Prog...