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Performing user authentication in Java EE / JSF using j_security_check
...web application making use of JSF 2.0 (and if any components do exist) and Java EE 6 core mechanisms (login/check permissions/logouts) with user information hold in a JPA entity. The Oracle Java EE tutorial is a bit sparse on this (only handles servlets).
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Splitting a Java String by the pipe symbol using split(“|”)
The Java official documentation states:
7 Answers
7
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Cast Double to Integer in Java
Any way to cast java.lang.Double to java.lang.Integer ?
17 Answers
17
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Is System.nanoTime() completely useless?
As documented in the blog post Beware of System.nanoTime() in Java , on x86 systems, Java's System.nanoTime() returns the time value using a CPU specific counter. Now consider the following case I use to measure time of a call:
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round up to 2 decimal places in java? [duplicate]
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did you import java.text.DecimalFormat; ?
– amitchhajer
Jul 28 '12 at 13:42
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How to set thousands separator in Java?
How to set thousands separator in Java?
I have String representation of a BigDecimal that I want to format with a thousands separator and return as String.
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How to convert Milliseconds to “X mins, x seconds” in Java?
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Use the java.util.concurrent.TimeUnit class:
String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(millis),
TimeUnit.MILLISECONDS.toSeconds(millis) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes...
Convert String[] to comma separated string in java
... go and guess because the answer posted in 2011 long before the release of Java 8 ;)
– Nico Huysamen
Apr 10 '18 at 4:50
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Java: method to get position of a match in a String?
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text.indexOf(match);
See the String javadoc
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static allocation in java - heap, stack and permanent generation
I have been lately reading a lot on memory allocation schemes in java, and there have been many doubts as I have been reading from various sources. I have collected my concepts, and I would request to go through all of the points and comment on them. I came to know that memory allocation is JVM spec...