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Why does sun.misc.Unsafe exist, and how can it be used in the real world?
... address.It is possible to retrieve an
object’s memory address using the java.lang.Unsafe class, and operate on its fields directly via unsafe get/put methods!
Compile time optimizations for JVM. HIgh performance VM using "magic", requiring low-level operations. eg: http://en.wikipedia.org/wiki/Ji...
Division of integers in Java [duplicate]
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Is there any keyword in java to divide two numbers e.g. 'Math.floorDiv(num1,num2)'
– Rudra
Jan 4 '16 at 12:51
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Functional style of Java 8's Optional.ifPresent and if-not-Present?
In Java 8, I want to do something to an Optional object if it is present, and do another thing if it is not present.
12 A...
Best way to concatenate List of String objects? [duplicate]
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Your approach is dependent on Java's ArrayList#toString() implementation.
While the implementation is documented in the Java API and very unlikely to change, there's a chance it could. It's far more reliable to implement this yourself (loops, StringBuild...
I get exception when using Thread.sleep(x) or wait()
I have tried to delay - or put to sleep - my Java program, but an error occurs.
13 Answers
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Split string to equal length substrings in Java
... split the string "Thequickbrownfoxjumps" to substrings of equal size in Java.
Eg. "Thequickbrownfoxjumps" of 4 equal size should give the output.
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Obtaining a powerset of a set in Java
... This method is now in Guava: guava-libraries.googlecode.com/svn/trunk/javadoc/com/google/…
– Kevin Bourrillion
Jul 9 '10 at 1:59
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Data access object (DAO) in Java
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Check also the sequence diagram here:
http://www.oracle.com/technetwork/java/dataaccessobject-138824.html
Maybe a simple example can help you understand the concept:
Let's say we have an entity to represent an employee:
public class Employee {
private int id;
private String name;
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How to get the filename without the extension in Java?
... surprised how many convenience methods are already included in JDK 7 with java.nio.file.Files and Path -- such as resolving base directories, one-line copying/moving files, getting only the file name etc.
– Don Cheadle
Feb 19 '15 at 20:13
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Tooltips for cells in HTML table (no Javascript)
Is it possible to have tooltips for table cells with no JavaScript. Can't use it.
6 Answers
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