大约有 7,479 项符合查询结果（耗时：0.0201秒） [XML]
How is CountDownLatch used in Java Multithreading?
Can someone help me to understand what Java CountDownLatch is and when to use it?
12 Answers
...
What's the advantage of a Java enum versus a class with public static final fields?
I am very familiar with C# but starting to work more in Java. I expected to learn that enums in Java were basically equivalent to those in C# but apparently this is not the case. Initially I was excited to learn that Java enums could contain multiple pieces of data which seems very advantageous ( ht...
Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Java 反射最佳实践概要：最简单优雅的使用反射。本文的例子都可以在示例代码中看到并下载，如果喜欢请star，如果觉得有纰漏请提交issue，如果你有更好的点子...概要：最简单优雅的使用反射。
本文的例子都可以在示例代码...
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).
...
Splitting a Java String by the pipe symbol using split(“|”)
The Java official documentation states:
7 Answers
7
...
Cast Double to Integer in Java
Any way to cast java.lang.Double to java.lang.Integer ?
17 Answers
17
...
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:
...
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.
...
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...