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Which concurrent Queue implementation should I use in Java?
From the JavaDocs:
6 Answers
6
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Is null check needed before calling instanceof?
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The expression x instanceof SomeClass is false if x is null.
From the Java Language Specification, section 15.20.2, "Type comparison operator instanceof":
"At run time, the result of the
instanceof operator is true if the
value of the RelationalExpression is
not null and the referenc...
What's the difference between Jetty and Netty?
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Jetty is a lightweight servlet container, easy to embed within a java application, there is an easy to use jetty client also.
Netty is an asynchronous event-driven network application framework.
You can write your own servlet container or http client app with help of the Netty framework f...
Difference between ProcessBuilder and Runtime.exec()
I'm trying to execute an external command from java code, but there's a difference I've noticed between Runtime.getRuntime().exec(...) and new ProcessBuilder(...).start() .
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How do I make an http request using cookies on Android?
...//github.com/apache/httpcomponents-client/blob/master/httpclient5/src/test/java/org/apache/hc/client5/http/examples/ClientFormLogin.java
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
i...
Converting a date string to a DateTime object using Joda Time library
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FYI, the troublesome old date-time classes such as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes built into Java 8 & Java 9. See Tutorial by Oracle. And the java.time classes are thread-safe, unlike ...
What encoding/code page is cmd.exe using?
...ąęźżńł
Russian абвгдеж эюя
CJK 你好
Here’s a Java program to print out the test file in a bunch of different
Unicode encodings. It could be in any programming language; it only prints
ASCII characters or encoded bytes to stdout.
import java.io.*;
public class Foo {
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Mockito + PowerMock LinkageError while mocking system class
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Try adding this annotation to your Test class:
@PowerMockIgnore("javax.management.*")
Worked for me.
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Linux/Unix command to determine if process is running?
...ossible processes that you are not interested in.
Example: show me if any java process with supplied argument:
-Djava.util.logging.config.file=logging.properties
is running
ps ax | grep -v grep | grep java | grep java.util.logging.config.file=logging.properties | wc -l
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From Arraylist to Array
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JavaDocs are your friend. If the array being passed in is too small a new array is returned. The other version of the method that takes no args returns an array of Object
– Brian Roach
N...