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Schema for a multilanguage database
I'm developing a multilanguage software. As far as the application code goes, localizability is not an issue. We can use language specific resources and have all kinds of tools that work well with them.
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How to get the first non-null value in Java?
Is there a Java equivalent of SQL's COALESCE function? That is, is there any way to return the first non-null value of several variables?
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Failed to load the JNI shared Library (JDK)
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You need a 64-bit trio:
64-bit OS
64-bit Java
64-bit Eclipse
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Eclipse returns error message “Java was started but returned exit code = 1”
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The error message points to a problem with your Java version. Do you have a JDK installed?
Try adding the following (noting the new line):
/!\ make sure, that the -vm option occurs before the -vmargs command.
Everything after -vmargs is passed directly to the JVM.
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Javadoc: package.html or package-info.java
When trying to create package level Javadoc comments, whats the preferred method? What do you do?
1 Answer
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How to convert a char array back to a string?
...t this is a very unusual situation: Because String is handled specially in Java, even "foo" is actually a String. So the need for splitting a String into individual chars and join them back is not required in normal code.
Compare this to C/C++ where "foo" you have a bundle of chars terminated by a ...
Extract digits from a string in Java
I have a Java String object. I need to extract only digits from it. I'll give an example:
14 Answers
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Convert a string representation of a hex dump to a byte array using Java?
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It doesn't work for the String "0". It throws an java.lang.StringIndexOutOfBoundsException
– ovdsrn
Jun 8 '11 at 20:06
51
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What is the difference between JVM, JDK, JRE & OpenJDK?
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JVM
The Java Virtual Machine (JVM) is the virtual machine that runs the Java bytecodes. The JVM doesn't understand Java source code; that's why you need compile your *.java files to obtain *.class files that contain the bytecodes und...
How to Iterate over a Set/HashSet without an Iterator?
...opulate set
for (String s : set) {
System.out.println(s);
}
Or with Java 8:
set.forEach(System.out::println);
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