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Java Timer vs ExecutorService?
I have code where I schedule a task using java.util.Timer . I was looking around and saw ExecutorService can do the same. So this question here, have you used Timer and ExecutorService to schedule tasks, what is the benefit of one using over another?
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Variable length (Dynamic) Arrays in Java
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Yes: use ArrayList.
In Java, "normal" arrays are fixed-size. You have to give them a size and can't expand them or contract them. To change the size, you have to make a new array and copy the data you want - which is inefficient and a pain for you...
How to fix: “No suitable driver found for jdbc:mysql://localhost/dbname” error when using pools? [du
....jar && wget http://central.maven.org/maven2/mysql/mysql-connector-java/5.1.27/mysql-connector-java-5.1.27.jar
– jmojico
Dec 17 '19 at 16:38
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How to write a UTF-8 file with Java?
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If you read the Java docs on the link shown in the question, then it tells you the version of the Commons IO API where the write APIs were introduced. It looks like the write APIs were introduced from v2.0 onwards.
– A_...
Uncatchable ChuckNorrisException
Is it possible to construct a snippet of code in Java that would make a hypothetical java.lang.ChuckNorrisException uncatchable?
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Finding Key associated with max Value in a Java Map
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Would Java 8 streams usage help in simplifying this anymore? e.x: map.forEach((k,v) -> ...
– zkarthik
Dec 24 '14 at 17:04
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How to call a method with a separate thread in Java?
...t = new Thread(myRunnable)
t.start();
}
}
Take a look at Java's concurrency tutorial to get started.
If your method is going to be called frequently, then it may not be worth creating a new thread each time, as this is an expensive operation. It would probably be best to use a thr...
How can I get System variable value in Java?
...s either the current value of a system wide variable or a user variable in Java, see below:
String javaHome = System.getenv("JAVA_HOME");
For more information on environment variables see this wikipedia page.
Also make sure the environment variable you are trying to read is properly set before i...
How to generate UML diagrams (especially sequence diagrams) from Java code?
...w can I generate UML diagrams (especially sequence diagrams) from existing Java code?
16 Answers
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How to install JSTL? The absolute uri: http://java.sun.com/jstl/core cannot be resolved
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org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
That URI is for JSTL 1.0, but you're actually using JSTL 1.2 which uses URIs with an additional /jsp path (because ...