大约有 7,580 项符合查询结果（耗时：0.0117秒） [XML]
Cast Double to Integer in Java
Any way to cast java.lang.Double to java.lang.Integer ?
17 Answers
17
...
round up to 2 decimal places in java? [duplicate]
...
did you import java.text.DecimalFormat; ?
– amitchhajer
Jul 28 '12 at 13:42
2
...
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.
...
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).
...
Java: method to get position of a match in a String?
...
text.indexOf(match);
See the String javadoc
share
|
improve this answer
|
follow
|
...
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:
...
How to convert Milliseconds to “X mins, x seconds” in Java?
...
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...
How do I initialize a byte array in Java?
I have to store some constant values (UUIDs) in byte array form in java, and I'm wondering what the best way to initialize those static arrays would be. This is how I'm currently doing it, but I feel like there must be a better way.
...
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...
Java serialization: readObject() vs. readResolve()
The book Effective Java and other sources provide a pretty good explanation on how and when to use the readObject() method when working with serializable Java classes. The readResolve() method, on the other hand, remains a bit of a mystery. Basically all documents I found either mention only one o...