大约有 7,700 项符合查询结果（耗时：0.0250秒） [XML]
Java time-based map/cache with expiring keys [closed]
Do any of you know of a Java Map or similar standard data store that automatically purges entries after a given timeout? This means aging, where the old expired entries “age-out” automatically.
...
How to activate JMX on my JVM for access with jconsole?
...
The relevant documentation can be found here:
http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html
Start your program with following parameters:
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=9010
-Dcom.sun.management.jmxremote.rmi.po...
Spring vs EJB. Can Spring replace EJB? [closed]
...n to support the EJB standard can, in theory, be ported from one compliant Java EE app server to another. But that means staying away from any and all vendor-specific extensions that lock you in to one vendor.
Spring ports easily between app servers (e.g., WebLogic, Tomcat, JBOSS, etc.) because it...
How do I use a custom Serializer with Jackson?
I have two Java classes that I want to serialize to JSON using Jackson:
11 Answers
11
...
Java: PrintStream to String?
...
Use a ByteArrayOutputStream as a buffer:
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final String utf8 = StandardCharsets.UTF_8.name();
...
How to use Comparator in Java to sort
....format("{name=%s, age=%d}", name, age);
}
}
EDIT
And an equivalent Java 8 demo would look like this:
public class ComparatorDemo {
public static void main(String[] args) {
List<Person> people = Arrays.asList(
new Person("Joe", 24),
new Pers...
Deleting an object in java?
.... Runtime.getRuntime().gc(). More Info:he garbage collection routines that Java provides are members of the Runtime class. The Runtime class is a special class that has a single object (a Singleton) for each main program. The Runtime object provides a mechanism for communicating directly with the vi...
How do I clone a generic List in Java?
...
docs.oracle.com/javase/8/docs/api/java/util/… Doesn't work because the list sizes are different.
– MLProgrammer-CiM
Mar 30 '16 at 17:59
...
Abstract class in Java
What is an "abstract class" in Java?
14 Answers
14
...
Why is super.super.method(); not allowed in Java?
...e cases, perhaps you could overcome inor's objection with dynamic proxies (javahowto.blogspot.co.uk/2011/12/…), redirecting method calls to the original object (synchronizing variables after each call)? It seems that proxies require everything to be implementing an interface, though. Also, I won...