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How can I use external JARs in an Android project?
...r Eclipse
A good way to add external JARs to your Android project or any Java project is:
Create a folder called libs in your project's root folder
Copy your JAR files to the libs folder
Now right click on the Jar file and then select Build Path > Add to Build
Path, which will create a folder...
Java HashMap performance optimization / alternative
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Just use java.util.Arrays.hashCode(). It's simpler (no code to write and maintain by yourself), its calculation is probably faster (fewer multiplications), and the distribution of its hash codes will probably be more even.
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Intellij IDEA Java classes not auto compiling on save
...e one small change in one single class. Even the "Compile 'StartController.java'" meaning one class only takes 3-4 seconds. Eclipse does this in less than 100 milliseconds. I will test the eclipse mode plugin again and decide what to go with..
– mmm
Jan 5 '14 a...
How to visualize an XML schema? [closed]
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The open source command line java application xsdvi creates an interactive diagram in SVG format from an XML Schema Definition. The generated SVG file can be displayed by a modern web browser where the user can expand and collapse the tree by mouse click...
What Java ORM do you prefer, and why? [closed]
...rence might be in the dynamic nature of python (and perl). Using an ORM in Java is a pain. But in dynamic languages it can be really expressive. There are some great projects to embed ORM operations like DSLs in Python and are great.
– santiagobasulto
Apr 26 '1...
程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...安全级别高；
RC4，也是为 RSA Data Security, Inc. 开发的密码系统的商标名称。
传统的DES由于只有56位的密钥，从1997年开始，RSA公司发起了一个称作“向DES挑战”的竞技赛。在首届挑战赛上，罗克·维瑟用了96天时间破解了用DES加...
How to create a file in Android?
...ing to the docs, calling close will perform a flush first. docs.oracle.com/javase/6/docs/api/java/io/…
– Eliot
Aug 19 '13 at 22:36
2
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StringUtils.isBlank() vs String.isEmpty()
...("bob") = false
StringUtils.isEmpty(" bob ") = false
Warning: In java.lang.String.isBlank() and java.lang.String.isEmpty() work the same except they don't return true for null.
java.lang.String.isBlank() (since Java 11)
java.lang.String.isEmpty()
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In Python, how do I indicate I'm overriding a method?
In Java, for example, the @Override annotation not only provides compile-time checking of an override but makes for excellent self-documenting code.
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Remove Elements from a HashSet while Iterating [duplicate]
So, if I try to remove elements from a Java HashSet while iterating, I get a ConcurrentModificationException . What is the best way to remove a subset of the elements from a HashSet as in the following example?
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