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Why does the JVM still not support tail-call optimization?
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Diagnosing Java Code: Improving the Performance of Your Java Code (alt) explains why the JVM does not support tail-call optimization.
But although it is well known how to automatically transform a tail-recursive function into a sim...
How to format strings in Java
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In addition to String.format, also take a look java.text.MessageFormat. The format less terse and a bit closer to the C# example you've provided and you can use it for parsing as well.
For example:
int someNumber = 42;
String someString = "foobar";
Object[] args = ...
How do I convert a Java 8 IntStream to a List?
... methods. This is done by adding the Collectors class in Preferences -> Java -> Editor -> Content Assist -> Favorites. After this, you only have to type toLi at hit Ctr+Space to have the IDE fill in toList and add the static import.
– Lii
Jun 29 '16...
How to directly initialize a HashMap (in a literal way)?
Is there some way of initializing a Java HashMap like this?:
14 Answers
14
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Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
...he certificate for App2 to the truststore file of the used JVM located at %JAVA_HOME%\lib\security\cacerts.
First you can check if your certificate is already in the truststore by running the following command:
keytool -list -keystore "%JAVA_HOME%/jre/lib/security/cacerts" (you don't need to provid...
How do I enable TODO/FIXME/XXX task tags in Eclipse?
...You can configure which task tags should be used in the workspace options: Java > Compiler > Task tags
Check if they are enabled in this location, and that should be enough to have them appear in the Task list (or the Markers view).
Extra note: reinstalling Eclipse won't change anything mo...
Wrapping null-returning method in Java with Option in Scala?
... know whether it will return you a string or a null, because it comes from Java.
4 Answers
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Use of the MANIFEST.MF file in Java
...content of the Manifest file in a JAR file created with version 1.0 of the Java Development Kit is the following.
Manifest-Version: 1.0
All the entries are as name-value pairs. The name of a header is separated from its value by a colon. The default manifest shows that it conforms to version 1.0 ...
How to make pipes work with Runtime.exec()?
...ocess".
At least with "ls" you have a language-independent (albeit slower) Java replacement. Eg.:
File f = new File("C:\\");
String[] files = f.listFiles(new File("/home/tihamer"));
for (String file : files) {
if (file.matches(.*some.*)) { System.out.println(file); }
}
With "ps", it's a bit ...
Count lines of code in all java classes in Android Studio
Is there any way I can view the total lines of code in each java class in my project?
5 Answers
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