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How to kill a process running on particular port in Linux?
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Use the command
sudo netstat -plten |grep java
used grep java as tomcat uses java as their processes.
It will show the list of processes with port number and process id
tcp6 0 0 :::8080 :::* LISTEN
1000 30...
If i synchronized two methods on the same class, can they run simultaneously?
... the core concept is the intrinsic lock behind the scenes.
Here is how the Java tutorial describes the relationship:
Synchronization is built around an internal entity known as the intrinsic lock or monitor lock. (The API specification often refers to this entity simply as a "monitor.") Intrinsic l...
How to clone an InputStream?
...) method and prevent it from being called somehow.
UPDATE (2019):
Since Java 9 the the middle bits can be replaced with InputStream.transferTo:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
input.transferTo(baos);
InputStream firstClone = new ByteArrayInputStream(baos.toByteArray());...
Handling InterruptedException in Java
...it happens I was just reading about this this morning on my way to work in Java Concurrency In Practice by Brian Goetz. Basically he says you should do one of three things
Propagate the InterruptedException - Declare your method to throw the checked InterruptedException so that your caller has to...
Number.sign() in javascript
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Should this not support JavaScript’s (ECMAScript’s) signed zeroes? It seems to work when returning x rather than 0 in the “megafast” function:
function sign(x) {
return typeof x === 'number' ? x ? x < 0 ? -1 : 1 : x === x ? x : NaN :...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
...mmercial one)
They both have "almost" the same code of the classes in the Java API; but the code for the virtual machine itself is actually different, and when it comes to libraries, OpenJDK tends to use open libraries while Oracle tends to use closed ones; for instance, the font library.
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How can I output leading zeros in Ruby?
...intf, but similar formating functions are available in perl, ruby, python, java, php, etc.
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How do I hotkey directly to File Search tab in Eclipse
When I use CTRL + H I end up on the Java Search tab. I would very much like a shortcut to go directly to File Search instead. Is that possible?
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Should I always use a parallel stream when possible?
With Java 8 and lambdas it's easy to iterate over collections as streams, and just as easy to use a parallel stream. Two examples from the docs , the second one using parallelStream:
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How to convert / cast long to String?
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Nice, but note that java.util.Objects is only available since Java 7.
– Guillaume Husta
Jul 23 '14 at 9:12
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