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When do you use varargs in Java?
...vocation. You can write code to build an array and pass it, or you can let Java do it for you when you choose to receive it in a varargs parameter.
– H2ONaCl
Dec 24 '15 at 23:01
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Things possible in IntelliJ that aren't possible in Eclipse?
...ings you to where clicked object is defined works everywhere - not only in Java classes and variables in Java code, but in Spring configuration (you can click on class name, or property, or bean name), in Hibernate (you can click on property name or class, or included resource), you can navigate wit...
Android Camera : data intent returns null
...ackages_apps_camera/blob/gingerbread-release/src/com/android/camera/Camera.java#L1186
Bundle newExtras = new Bundle();
if (mCropValue.equals("circle")) {
newExtras.putString("circleCrop", "true");
}
if (mSaveUri != null) {
newExtras.putParcelable(MediaStore.EXTRA_OUTPUT, mSaveUri);
} else {...
Useful example of a shutdown hook in Java?
I'm trying to make sure my Java application takes reasonable steps to be robust, and part of that involves shutting down gracefully. I am reading about shutdown hooks and I don't actually get how to make use of them in practice.
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Why doesn't C++ have a garbage collector?
...nherent incompatibility between threading/forking and garbage collection. Java and C# both have high performance preemptive multithreading and and a garbage collector. There are issues to do with realtime applications and a garbage collector, as most garbage collectors have to stop the world to ru...
Removing whitespace from strings in Java
...string is not modified as some of the answers sort of imply.
(Experienced Java developers might say "of course, you can't actually modify a String", but the target audience for this question may well not know this.)
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Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile
...t;JRE System Library -->Environments--> Installed JREs-->Point to java folder in c: drive (Windows) and select JDK folder and ok.
2.Remove the already present JRE from build path.
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java.lang.RuntimeException: Unable to instantiate activity ComponentInfo
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There is another way to get an java.lang.RuntimeException: Unable to instantiate activity ComponentInfo exception and that is the activity that you are trying to start is abstract. I made this stupid mistake once and its very easy to overlook.
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How to remove single character from a String
For accessing individual characters of a String in Java, we have String.charAt(2) . Is there any inbuilt function to remove an individual character of a String in java?
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What issues should be considered when overriding equals and hashCode in Java?
...ory (for the language lawyers and the mathematically inclined):
equals() (javadoc) must define an equivalence relation (it must be reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are not modified, then it must keep returning the same value). Furthermore, o....