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Java - get pixel array from image
...d!
Here is a comparison I've setup to compare the two approaches:
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.IOException;
import javax.imageio.ImageIO;
public class PerformanceTest {
public static void main(String[] args) throws IOException {
...
How does lombok work?
I met lombok today.
I'm very anxious to know how it works.
A Java Geek Article gives some clues but it's not perfectly clear to me:
...
How to stop Eclipse formatter from placing all enums on one line
...sensible formatting for me in Eclipse Juno:
Window > Preferences > Java > Code Style > Formatter
Click Edit
Select the Line Wrapping tab
Select the enum declaration treenode
Set Line wrapping policy to Wrap all elements, every element on a new line (...) so it now says 3 of 3 in the pa...
How can I get a list of build targets in Ant?
...just invoking ant, create a target like <target name="help"> <java classname="org.apache.tools.ant.Main"> <arg value="-projecthelp" /> <arg value="-buildfile" /> <arg value="${ant.file}" /> </java> </target> and make "help" th...
What is the difference between Reader and InputStream?
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Background of InputStream & Reader:
In the early days of java, the only way to perform console input was to use a byte stream(InputStream and OutputStream).
Use cases:
Today, using a byte stream to read console stream is also acceptable. However, for commercial applications, the pr...
What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
...adb.device.arg=-d -v release install
[signjar] Executing 'C:\Program Files\Java\jdk1.7.0_03\bin\jarsigner.exe' with arguments:
[signjar] '-keystore'
[signjar] 'C:\cygwin\home\Chloe\pairfinder\release.keystore'
[signjar] '-signedjar'
[signjar] 'C:\cygwin\home\Chloe\pairfinder\bin\PairFinder-release-u...
Builder Pattern in Effective Java
I have recently started to read Effective Java by Joshua Bloch. I found the idea of the Builder pattern [Item 2 in the book] really interesting. I tried to implement it in my project but there were compilation errors. Following is in essence what I was trying to do:
...
Python != operation vs “is not”
... My favorite way to comprehend this is: Python's is is like Java's ==. Python's == is like Java's .equals(). Of course this only helps if you know Java.
– MatrixFrog
Feb 5 '10 at 20:54
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Multiple inheritance for an anonymous class
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Anonymous classes must extend or implement something, like any other Java class, even if it's just java.lang.Object.
For example:
Runnable r = new Runnable() {
public void run() { ... }
};
Here, r is an object of an anonymous class which implements Runnable.
An anonymous class can exte...
Why does Double.NaN==Double.NaN return false?
...
NaN means "Not a Number".
Java Language Specification (JLS) Third Edition says:
An operation that overflows produces a signed infinity, an operation that underflows produces a denormalized value or a signed zero, and an operation that has no mathe...