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Is it possible to use the instanceof operator in a switch statement?
...
Just in case if someone will read it:
The BEST solution in java is :
public enum Action {
a{
void doAction(...){
// some code
}
},
b{
void doAction(...){
// some code
}
},
c{
void doAction(...)...
POST request send json data java HttpUrlConnection
I have developed a java code that convert the following cURL to java code using URL and HttpUrlConnection.
the curl is :
5...
How to calculate “time ago” in Java?
...licated logic and just delete the last delimiter when you're done.
import java.util.concurrent.TimeUnit;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
public class TimeUtils {
/**
* Converts time to a human readable format within the specified range
*
* @param durat...
Why seal a class?
...e type which is subclassed may become mutable (ick)
Item 17 of Effective Java goes into more details on this - regardless of the fact that it's written in the context of Java, the advice applies to .NET as well.
Personally I wish classes were sealed by default in .NET.
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When should we implement Serializable interface?
...riablizble interface to all of domain models...
– theJava
Dec 28 '10 at 19:39
8
@theJava It's not...
Download attachments using Java Mail
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Some time saver for the code where you save the attachment file :
with javax mail version 1.4 and after , you can say
// SECURITY LEAK - do not do this! Do not trust the 'getFileName' input. Imagine it is: "../etc/passwd", for example.
// bodyPart.saveFile("/tmp/" + bodyPart.getFileName());
i...
How to Copy Text to Clip Board in Android?
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Yesterday I made this class. Take it, it's for all API Levels
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import android.annotation.SuppressLint;
import android.content.ClipData;
import android.content.Cli...
How to initialize log4j properly?
...(Look for the "Default Initialization Procedure" section).
For example:
java -Dlog4j.configuration=customName ....
Will cause log4j to look for a file called customName on the classpath.
If you are having problems I find it helpful to turn on the log4j.debug:
-Dlog4j.debug
It will print to ...
HTTPURLConnection Doesn't Follow Redirect from HTTP to HTTPS
I can't understand why Java's HttpURLConnection does not follow an HTTP redirect from an HTTP to an HTTPS URL. I use the following code to get the page at https://httpstat.us/ :
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Why is “int i = 2147483647 + 1;” OK, but “byte b = 127 + 1;” is not compilable?
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Actually, today I read some of Java puzzlers , including a puzzle just about that... See here: javapuzzlers.com/java-puzzlers-sampler.pdf - puzzle 3
– MByD
Jul 31 '11 at 13:47
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