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Read entire file in Scala?
...out Source: yes, it is the canonical I/O library. Most code ends up using java.io due to its lower-level interface and better compatibility with existing frameworks, but any code which has a choice should be using Source, particularly for simple file manipulation.
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Java - Method name collision in interface implementation
... no way to implement the same method in two different ways in one class in Java.
That can lead to many confusing situations, which is why Java has disallowed it.
interface ISomething {
void doSomething();
}
interface ISomething2 {
void doSomething();
}
class Impl implements ISomething, I...
How to quit a java app from within the program
What's the best way to quit a Java application with code?
12 Answers
12
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How to force garbage collection in Java?
Is it possible to force garbage collection in Java, even if it is tricky to do? I know about System.gc(); and Runtime.gc(); but they only suggest to do GC. How can I force GC?
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Converting java.util.Properties to HashMap
java.util.Properties is a implementation of java.util.Map , And java.util.HashMap's constructor receives a Map type param. So, why must it be converted explicitly?
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How to convert hashmap to JSON object in Java
How to convert or cast hashmap to JSON object in Java, and again convert JSON object to JSON string?
29 Answers
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package R does not exist
...anifest.xml file.
If there are no errors in the resource XML files, the R.java source
will be generated in a package subdirectory below gen/ and compiled.
There is another R class located in the android package. This android.R class contains some nested classes, which in turn contain ids and oth...
Difference between return and exit in Bash functions
...unction. 0 is true but false is 1 in the shell, different from other prog langs.
For more info on functions:
http://www.linuxjournal.com/content/return-values-bash-functions
NOTE: The isdirectory function is for instructional purposes only. This should not be how you perform such an option in a r...
How can I convert tabs to spaces in every file of a directory?
...g those under svn, .git! Read the comments before using!
find . -iname '*.java' -type f -exec sed -i.orig 's/\t/ /g' {} +
The original file is saved as [filename].orig.
Replace '*.java' with the file ending of the file type you are looking for. This way you can prevent accidental corruption of b...
Convert int to char in java
...ted by the value of 48.
We typed (a + '0') and in order to add these up, Java converted '0' to its ASCII value which is 48 and a is 1 so the sum is 49. Then what we did is:
(char)(49)
We casted int to char. ASCII equivalent of 49 is '1'. You can convert any digit to char this way and is smarter...