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I'm learning java by myself and read a question in a book which states: "which java class never needs to be imported." Can anyone help me?
java.lang.* is always automatically imported.
This contains classes like System, Object, String, Math, etc.
Here are the docs.
The Object class that every other class derives from. Other examples are String, System and the autoboxing classes (Integer, Boolean etc.).
Are you referring to a package? The java.lang package is automatically imported in any Java program. Please read this for more information.
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So, I have this question here, which has been answered. I'm looking to replicate the marked answer in Java. Is there any way I can do some/most/all of it in Java?
Of course Java can be used to replace grep as seen e.g. in this question.
As you really want extract parameter values from a URL you could e.g. go with this approach, where a simple Java-function returns all parameters and their values as a Map. If you already use a HTTP-related library you may also want to look if they included a similar function.
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I've seen -Xbootclasspath/p:path being used for loading class dynamically can you please elaborate and explain by providing example.
go to your command line and type java -X, to see the options available, -Xbootclasspath followed by path to comma seperated lists of jar files specified to prepend these classes before the standard jre classes. A use would be if you want to add patches affecting core runtime libraries.
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I want to develope an application which extracts data from another application (the "whatsapp" application) when i am getting an incoming call.
How can I do it?
Maybe relevant guids will help :)
Thanks in advance!
Yogo.
It is generally not possible, unless if the application makes it public, for instance, sharing data via Intent or storing files in a public folder, e.g. in the SDCard.
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I am writing a cross-platform IDE, and am wondering what the best way to compile a program (with gcc) using java code. (It's also a cross-language IDE)
Should I access the command prompt/terminal?
Also can I have some example code?
You can probably just execute gcc in a separate process. But rather than handling this all yourself, use something like Apache Commons Exec, which is great for this sort of thing.
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I've found on the Internet many references about the use of PersistenceExceptionTranslationPostProcessor bean.
But its use is still too dark for me, I've searched for explanations with no success... can someone explain to me what is the utility of this bean?
Regards.
I've found more information about this class.
I fact it is used to translate all errors generated during the persistence process (HibernateExceptions, PersistenceExceptions...) into DataAccessException objects.