大约有 7,481 项符合查询结果（耗时：0.0215秒） [XML]
Spring get current ApplicationContext
...
The following ApplicationContextProvider.java answer looks to be the most reliable solution for this.
– Ionut
Jan 17 '16 at 12:32
1
...
Why does Java switch on contiguous ints appear to run faster with added cases?
I am working on some Java code which needs to be highly optimized as it will run in hot functions that are invoked at many points in my main program logic. Part of this code involves multiplying double variables by 10 raised to arbitrary non-negative int exponent s. One fast way (edit: but no...
JUnit 4 compare Sets
...
Uhm, how come I get: java.lang.AssertionError: expected: java.util.Hashtable<{CompanyName=8PKQ9va3nW8pRWb4SjPF2DvdQDBmlZ, Ric=sZwmXAdYKv, Category=AvrIfd, QuoteId=4342740204922826921}> but was: java.util.Hashtable<{CompanyName=8PKQ9va3nW...
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
...
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
share
|
improve this answer
|
follow...
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/...