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Eclipse count lines of code
... Lines of Code metrics by ignoring blank and comment-only lines or exclude Javadoc if you want. To do this check the tab at Preferences -> Metrics -> LoC.
That's it. There is no special option to exclude curly braces {}.
The plugin offers an alternative metric to LoC called Number of Stateme...
Java - get pixel array from image
...d!
Here is a comparison I've setup to compare the two approaches:
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.IOException;
import javax.imageio.ImageIO;
public class PerformanceTest {
public static void main(String[] args) throws IOException {
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How can I sort a List alphabetically?
...ssuming that those are Strings, use the convenient static method sort…
java.util.Collections.sort(listOfCountryNames)
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String.equals versus == [duplicate]
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@mo in some cases even in java == can be misleading. Java caches strings and so something like this would return true. String a = "Hello"; String b = "Hello"; a == b is true even though one would normally expect the result to be false.
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Tracing XML request/responses with JAX-WS
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for this work in tomcat you need to add these commands to JAVA_OPTS in catalina.sh e.g. on the first line add: JAVA_OPTS=" -Dcom.sun.xml.ws.transport.http.client.HttpTransportPipe.dump=true -Dcom.sun.xml.internal.ws.transport.http.client.HttpTransportPipe.dump=true -Dcom.sun.xml.ws....
Why there is no ConcurrentHashSet against ConcurrentHashMap
...u use a method to produce a set from a given map (or map class).
Prior to Java 8, you produce a concurrent hash set backed by a concurrent hash map, by using Collections.newSetFromMap(map)
In Java 8 (pointed out by @Matt), you can get a concurrent hash set view via ConcurrentHashMap.newKeySet(). T...
How to check whether a string is Base64 encoded or not
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If you are using Java, you can actually use commons-codec library
import org.apache.commons.codec.binary.Base64;
String stringToBeChecked = "...";
boolean isBase64 = Base64.isArrayByteBase64(stringToBeChecked.getBytes());
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Booleans, conditional operators and autoboxing
...rue ? null : false` - Boolean (autoboxing of 3rd operand to Boolean)
See Java Language Specification, section 15.25 Conditional Operator ? :
For E1, the types of the 2nd and 3rd operands are Boolean and boolean respectively, so this clause applies:
If one of the second and third operands is ...
Find where java class is loaded from
Does anyone know how to programmaticly find out where the java classloader actually loads the class from?
11 Answers
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“loop:” in Java code. What is this, and why does it compile?
...but as a side note:
I have heard of interview questions a la "Why is this Java code valid?" (stripped the simpler example; here's the meaner one, thx Tim Büthe):
url: http://www.myserver.com/myfile.mp3
downLoad(url);
Would you all know what this code is (apart from awful)?
Solution: two labels...