This question already has answers here:
Java: How to create SHA-1 for a file?
(3 answers)
Closed 5 years ago.
I need to make a file storage where files will be addressed by theirs SHA-1. I know Git uses such approach.
Do you know exists Java implementation of this approach? Or correct name of such storage for searching in Google.
This approch is named Content Addressable Storage.
Related
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Is it really impossible to protect Android apps from reverse engineering?
(10 answers)
Closed 8 years ago.
I am building an android app and i want to secure its source code. I am building it by using Java. As i have gone through some answers here which is related to obfuscation of java code and protecting it from reverse engineering. So is it also possible in android development. If yes then how?
And if it is not possible then how can we protect apk file from reverse engineering.
Have a look at ProGuard :
Proguard
This question already has answers here:
Standard concise way to copy a file in Java?
(16 answers)
Closed 10 years ago.
I need to write a application to copy files(.jar,.xml,.sql,.exe) from different location to some specific location What would be the most efficient way of file copy using java?
Use java.nio.file.Files.File#copy which intoduced in java 7. Example -
Files.copy(source, target, REPLACE_EXISTING);
This is covered, in some detail, in Basic I/O tutorial
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to open a file with the default associated program
As in the title, how to determine the application that will be used by the OS to open a file?
For example I'd like to retrieve the application name and it's path for random pdf file...
Is there an internal Java method independant of the OS (working for most of them)?
Thx...
Probably not. For Windows, you need to deal with the registry. Writing to the Windows registry in Java is discussed in read/write to Windows Registry using Java.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How can I generate a tag cloud in Java, with OpenCloud?
I would like to know if there's an open source library (JAR) available to generate a tag-cloud in Java?
If the output you need should be in HTML you can use OpenCloud: http://sourceforge.net/projects/opencloud/
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
How do you sign a Java Midlet?
How do I sign a Java midlet?
What have you tried ? This is a tutorial readily available on Google (which lists a set of common problems along with the signing process). If this isn't working then it's worth publishing more specific info on what isn't working.