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When does System.gc() do something?
I know that garbage collection is automated in Java. But I understood that if you call System.gc() in your code that the JVM may or may not decide to perform garbage collection at that point. How does this work precisely? On what basis/parameters exactly does the JVM decide to do (or not do) a GC ...
Cannot highlight all occurrences of a selected word in Eclipse
...urrences have to enabled.You can enable it by going to Preferences --> Java --> Editor --> Mark Occurrences
– Vins
Mar 13 '14 at 8:59
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Comment Inheritance for C# (actually any language)
...
Java has this, and I use it all the time. Just do:
/**
* {@inheritDoc}
*/
And the Javadoc tool figures it out.
C# has similar marker:
<inheritDoc/>
You can read more here:
http://www.ewoodruff.us/shfbdocs/ht...
What difference between Jersey vs jax-rs
... For example: JAX-RS gives you a set of interfaces (standard Java interfaces) which are implemented by Jersey. So that set of interfaces (or classes) are needed as a dependency to be implemented.
– Ale Zalazar
Jul 26 '13 at 19:12
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Uses for Optional
Having been using Java 8 now for 6+ months or so, I'm pretty happy with the new API changes. One area I'm still not confident in is when to use Optional . I seem to swing between wanting to use it everywhere something may be null , and nowhere at all.
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Spring MVC: How to perform validation?
....
}
Method 1 : If you have Spring 3.x+ and simple validation to do, use javax.validation.constraints annotations (also known as JSR-303 annotations).
public class User {
@NotNull
private String name;
...
}
You will need a JSR-303 provider in your libraries, like Hibernate Valida...
Java switch statement: Constant expression required, but it IS constant
So, I am working on this class that has a few static constants:
13 Answers
13
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Protecting Java Source Code From Being Accessed [closed]
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Any Java IDE can format the code removing all invisible characters ;-) Still the morse-code idea is nice :-)
– Prakash K
Apr 17 '13 at 15:03
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Android 4.1: How to check notifications are disabled for the application?
... int uid = appInfo.Uid;
try {
var appOpsClass = Java.Lang.Class.ForName("android.app.AppOpsManager");
var checkOpNoThrowMethod = appOpsClass.GetMethod(CHECK_OP_NO_THROW,Java.Lang.Integer.Type,Java.Lang.Integer.Type,new Java.Lang.String().Class);//need to add St...
Setting property 'source' to 'org.eclipse.jst.jee.server:JSFTut' did not find a matching property
...clipse, the logging.properties file used by default is the JDK default at %JAVA_HOME%/jre/lib/logging.properties
If you want to use a different logging.properties file (e.g. in the tomcat server's conf directory), this needs to be set via the java.util.logging.config.file system property. e.g. to u...