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Convert Long into Integer
How to convert a Long value into an Integer value in Java?
14 Answers
14
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How can I increment a date by one day in Java?
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I'll quote some JavaDocs... Calendar.DATE: "...This is a synonym for DAY_OF_MONTH." I wish the JavaDocs would clarify that this would increment larger fields (like the month and year). Calendar.roll "Adds or subtracts (up/down) a single ...
How can I hash a password in Java?
I need to hash passwords for storage in a database. How can I do this in Java?
13 Answers
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Is there a Null OutputStream in Java?
...r an API I'm using, but I don't actually have a need for the output. Does Java have an OutputStream equivalent to > /dev/null ?
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Make $JAVA_HOME easily changable in Ubuntu [closed]
In Ubuntu, I'd like to switch my JAVA_HOME environment variable back and forth between Java 5 and 6.
8 Answers
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How do I add a new sourceset to Gradle?
...t source set in addition to the main and test source sets:
apply plugin: "java"
sourceSets {
// Note that just declaring this sourceset creates two configurations.
intTest {
java {
compileClasspath += main.output
runtimeClasspath += main.output
}
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Regex Named Groups in Java
It is my understanding that the java.regex package does not have support for named groups ( http://www.regular-expressions.info/named.html ) so can anyone point me towards a third-party library that does?
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What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java
...imitations of the JVM.
This arises out of the fact that not everything in Java is an object. In addition to objects, there are primitives. All objects in Java are descendant from java.lang.Object, but primitives are set apart and, presently*, not extensible by a programmer. Note also that primitive...
How to run a JAR file
...onstration, but here's another one from scratch. You need two files:
Test.java:
public class Test
{
public static void main(String[] args)
{
System.out.println("Hello world");
}
}
manifest.mf:
Manifest-version: 1.0
Main-Class: Test
Note that the text file must end with a n...
Where to find Java JDK Source Code? [closed]
I would like to see what a method in the Java API does. So I want the JDK Source Code.
Before I re-installed Linux I had the src.zip package with all the official source code in it. I just had to tell Eclipse where this file is and I could see the code. But now I don't have the file anymore...
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