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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:
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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?
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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...
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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How to start jenkins on different port rather than 8080 using command prompt in Windows?
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Use the following command at command prompt:
java -jar jenkins.war --httpPort=9090
If you want to use https use the following command:
java -jar jenkins.war --httpsPort=9090
Details are here
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What is the right way to POST multipart/form-data using curl?
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I had a hard time sending a multipart HTTP PUT request with curl to a Java backend. I simply tried
curl -X PUT URL \
--header 'Content-Type: multipart/form-data; boundary=---------BOUNDARY' \
--data-binary @file
and the content of the file was
-----------BOUNDARY
Content-Disposition: for...
Comment Inheritance for C# (actually any language)
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Java has this, and I use it all the time. Just do:
/**
* {@inheritDoc}
*/
And the Javadoc tool figures it out.
C# has similar marker:
<inheritDoc/>
You can read more here:
http://www.ewoodruff.us/shfbdocs/ht...