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How to add new elements to an array?
...st<String>. It's dynamically growable, unlike arrays (see: Effective Java 2nd Edition, Item 25: Prefer lists to arrays).
import java.util.*;
//....
List<String> list = new ArrayList<String>();
list.add("1");
list.add("2");
list.add("3");
System.out.println(list); // prints "[1, 2...
Java Enum Methods - return opposite direction enum
... cannot be instantiated, but it illustrates my point). Is this possible in Java?
6 Answers
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Differences between Ant and Maven [closed]
...r used either. I understand that they are used to automate the building of Java projects, but I do not know where to start from.
...
Why switch is faster than if
Lots of Java books describe the switch statement as being faster than the if else statement. But I did not find out anywhere why switch is faster than if .
...
Java: notify() vs. notifyAll() all over again
...d notifyAll() " then a lot of explanations will pop up (leaving apart the javadoc paragraphs). It all boils down to the number of waiting threads being waken up: one in notify() and all in notifyAll() .
...
Hadoop “Unable to load native-hadoop library for your platform” warning
... native to your HADOOP_OPTS like this:
export HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$HADOOP_HOME/lib/native"
PS: Thank Searene
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How to configure MongoDB Java driver MongoOptions for production use?
...eb looking for best practices for configuring MongoOptions for the MongoDB Java driver and I haven't come up with much other than the API. This search started after I ran into the "com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db
connection" error and by increasing the connections/...
Spring RestTemplate - how to enable full debugging/logging of requests/responses?
...on of ClientHttpRequestInterceptor to trace request and response:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpRequest;
import org.springframework.http.clie...
Java Round up Any Number
....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f4540684%2fjava-round-up-any-number%23new-answer', 'question_page');
}
);
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Why doesn't ruby support method overloading?
...s with static argument-based dispatch and without optional arguments (like Java, for example), it is sometimes almost impossible to tell for a mere mortal, which overload is going to be picked.
In C#, you can actually encode any 3-SAT problem into overload resolution, which means that overload res...