Like @EGHM said, it&#39;s `-Dapple.awt.UIElement=true`, but with **no quotes**. At least it works for me (OS X 10.7.5).

If you happen to be using Eclipse, you can add this JVM argument globally in Preferences &amp;rarr; Installed JREs:

![enter image description here][1]


  [1]: http://i.stack.imgur.com/I5uQG.png

Like @EHGM and @Nelson pointed out, `-Dapple.awt.UIElement=true` needs to be added as an argument to the JVM.

You can set it globally for all java applications launched from the command line (or a shell) by adding it to the `JAVA_TOOL_OPTIONS` environment variable.

    export JAVA_TOOL_OPTIONS=&quot;-Dapple.awt.UIElement=true&quot;

You could add the export statement to your `$HOME/.bashrc` or whatever startup script relevant to the shell you&#39;re using.

Try -Dapple.awt.UIElement=&quot;true&quot;

You can also put the statement into the project-level or global `gradle.properties` file

    systemProp.apple.awt.UIElement=true

I have a method which should support being called from any queue, and should expect to.

It runs some code in a background thread itself, and then uses `dispatch_get_main_queue` when it returns a value to its block argument.

I don&#39;t want it to force it onto the main queue if it wasn&#39;t when it entered the method. Is there a way to get a pointer to the current dispatch queue?

Get current dispatch queue?

Why doesn&#39;t this work?

&lt;pre&gt;&lt;code&gt;
$drvrInstFilePath = &quot;$sharePath\$imageName\ISO\`$OEM$\`$1\RPKTools\RPKDriverInst.bat&quot;
echo $drvrInstFilePath
$drvrInstContent = Get-Content -LiteralPath &quot;$sharePath\$imageName\ISO\`$OEM$\`$1\RPKTools\RPKDriverInst.bat&quot;  | Out-String
&lt;/pre&gt;&lt;/code&gt;

The echo shows the right path, but the Get-Content command expands the $oem and $1 to blank strings, even though they are escaped. Why?


Escaping dollar signs in PowerShell path is not working

After upgrading to OSX 10.8.4, background Java processes started placing a Java Cup icon in the Dock.  It causes the currently active window to loose focus which is very annoying when running some script that forks many short running Java processes (headless).  The file menu (top of the screen next to the apple symbol will show the name of the class file that Java is running, e.g. org.apache.hadoop.util.RunJar).

Since I&#39;m not explicitly launching these Java commands, I&#39;ve tried putting
alias java=&quot;java -Djava.awt.headless=true&quot; 
in .profile but this doesn&#39;t seem to help.  

Has anyone run into this and know how to fix it?

Thank you.

Stop Java Coffee Cup icon from appearing in the Dock on Mac OSX

After upgrading to OSX 10.8.4, background Java processes started placing a Java Cup icon in the Dock. It causes the currently active window to loose focus which is very annoying when running some script that forks many short running Java processes (headless). The file menu (top of the screen next to the apple symbol will show the name of the class file that Java is running, e.g. org.apache.hadoop.util.RunJar).
Since I'm not explicitly launching these Java commands, I've tried putting
alias java="java -Djava.awt.headless=true"
in .profile but this doesn't seem to help.
Has anyone run into this and know how to fix it?
Thank you.

Eclipse give me that warning in the following code:

	public int getTicket(int lotteryId, String player) {
		try {
	        c = DriverManager.getConnection(&quot;jdbc:mysql://&quot; + this.hostname + &quot;:&quot; + this.port + &quot;/&quot; + this.database, this.user, this.password); 
	        int ticketNumber;
	        
	        PreparedStatement p = c.prepareStatement(
	        		&quot;SELECT max(num_ticket) &quot; +
	        		&quot;FROM loteria_tickets &quot; +
	        		&quot;WHERE id_loteria = ?&quot;
	        		);
	        p.setInt(1, lotteryId);
	       	ResultSet rs = p.executeQuery();
	       	if (rs.next()) {
	       		ticketNumber = rs.getInt(1);
	       	} else {
	       		ticketNumber = -1;
	       	}
	       	
	       	ticketNumber++;
	       	
	       	p = c.prepareStatement(
	       			&quot;INSERT INTO loteria_tickets &quot; +
	       			&quot;VALUES (?,?,?,?)&quot;);
	       	p.setInt(1, lotteryId);
	       	p.setInt(2, ticketNumber);
	       	p.setString(3, player);
	       	p.setDate(4, new java.sql.Date((new java.util.Date()).getTime()));
	       	p.executeUpdate();
	       	
	       	return ticketNumber;
		} catch (Exception e) {
			e.printStackTrace();
		} finally {	
			if (c != null) {
				try {
					c.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			return -1;
		}
	}

What is wrong with my code?	

&#39;finally block does not complete normally&#39; Eclipse warning

What is wrong with the code there are lots of error while debugging. I am writing a code for a singleton class to connect with the database mysql.

Here is my code
    
    package com.glomindz.mercuri.util;
    import java.sql.Connection;
    import java.sql.Driver;
    import java.sql.DriverManager;
    import java.sql.SQLException;

    public class MySingleTon {
        String url = &quot;jdbc:mysql://localhost:3306/&quot;;
        String dbName = &quot;test&quot;;
        String driver = &quot;com.mysql.jdbc.Driver&quot;;
        String userName = &quot;root&quot;;
        String password = &quot;&quot;;

        private static MySingleTon myObj;	
        private Connection Con ;
        private MySingleTon() {
        	System.out.println(&quot;Hello&quot;);
        	Con= createConnection();
        }
        
        @SuppressWarnings(&quot;rawtypes&quot;)
        public Connection createConnection() {
        	Connection connection = null;
        	try {
        		// Load the JDBC driver
        		Class driver_class = Class.forName(driver);
        		Driver driver = (Driver) driver_class.newInstance();
        		DriverManager.registerDriver(driver);
        		connection = DriverManager.getConnection(url + dbName);
        	} catch (ClassNotFoundException e) {
        		e.printStackTrace();
        	} catch (SQLException e) {
        		e.printStackTrace();
        	} catch (IllegalAccessException e) {
        		e.printStackTrace();
        	} catch (InstantiationException e) {
        		e.printStackTrace();
        	}
        	return connection;
        }
        
        /**
         * Create a static method to get instance.
         */
        public static MySingleTon getInstance() {
        	if (myObj == null) {
        		myObj = new MySingleTon();
        	}
        	return myObj;
        }
        
        public static void main(String a[]) {
        	MySingleTon st = MySingleTon.getInstance();
        }
    }

I am new to java. Please help.

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver in Eclipse

I try to instantiate the inner class defined in the following Java code:

     public class Mother {
          public class Child {
              public void doStuff() {
                  // ...
              }
          }
     }

When I try to get an instance of Child like this

     Class&lt;?&gt; clazz= Class.forName(&quot;com.mycompany.Mother$Child&quot;);
     Child c = clazz.newInstance();

I get this exception:

     java.lang.InstantiationException: com.mycompany.Mother$Child
        at java.lang.Class.newInstance0(Class.java:340)
        at java.lang.Class.newInstance(Class.java:308)
        ...

What am I missing ?

How to instantiate an inner class with reflection in Java?

What is the equivalent c# keyword of super keyword (java).

My java code :

    public class PrintImageLocations extends PDFStreamEngine
    {
        public PrintImageLocations() throws IOException
        {
            super( ResourceLoader.loadProperties( &quot;org/apache/pdfbox/resources/PDFTextStripper.properties&quot;, true ) );
        } 

         protected void processOperator( PDFOperator operator, List arguments ) throws IOException
        {
         super.processOperator( operator, arguments );
        }


Now what exactly I need equivalent of super keyword  in C# 
initially tried with `base` whether the way I have used the keyword base in right way 
 

    class Imagedata : PDFStreamEngine
    {
       public Imagedata() : base()
       {                                          
             ResourceLoader.loadProperties(&quot;org/apache/pdfbox/resources/PDFTextStripper.properties&quot;, true);
       }
    
       protected override void processOperator(PDFOperator operations, List arguments)
       {
          base.processOperator(operations, arguments);
       }
    }

Can any one help me out.










Equivalent of Super Keyword in C#

So, I get some JSON values from the server but I don&#39;t know if there will be a particular field or not.

So like:

    { &quot;regatta_name&quot;:&quot;ProbaRegatta&quot;,
      &quot;country&quot;:&quot;Congo&quot;,
      &quot;status&quot;:&quot;invited&quot;
    }

And sometimes, there will be an extra field like:

    
    { &quot;regatta_name&quot;:&quot;ProbaRegatta&quot;,
      &quot;country&quot;:&quot;Congo&quot;,
      &quot;status&quot;:&quot;invited&quot;,
      &quot;club&quot;:&quot;somevalue&quot;
    }

I would like to check if the field named &quot;club&quot; exists so that at parsing I won&#39;t get 

&gt; org.json.JSONException: No value for club




How to check if a JSON key exists?

I want to run a simple command of replacing absolute paths to relative ones inside a CSS file like this:

    sed -i &#39;s/\/fonts/../fonts/&#39; /Users/sergeybasharov/WebstormProjects/snap/compiled/Content/stylesheets/style.css

It throws this

    sed: 1: &quot;/Users/sergeybasharov/W ...&quot;: bad flag in substitute command: &#39;b&#39;

What can be wrong in this simple script?

sed throws &#39;bad flag in substitute command&#39;

I&#39;m attempting to install Jekyll. After running `gem install jekyll` I get this error:

    ERROR:  While executing gem ... (Errno::EACCES)
        Permission denied - /usr/local/lib/ruby/gems/2.0.0/gems/jekyll-1.0.3/CONTRIBUTING.md

I can see that Jekyll is installed when I run `gem list` so I&#39;m thoroughly confused:

    *** LOCAL GEMS ***
    
    bigdecimal (1.2.0)
    classifier (1.3.3)
    colorator (0.1)
    commander (4.1.3)
    directory_watcher (1.4.1)
    fast-stemmer (1.0.2)
    highline (1.6.19)
    io-console (0.4.2)
    jekyll (1.0.3)
    json (1.7.7)
    kramdown (1.0.2)
    liquid (2.5.0)
    maruku (0.6.1)
    minitest (4.3.2)
    posix-spawn (0.3.6)
    psych (2.0.0)
    pygments.rb (0.5.1)
    rake (0.9.6)
    rdoc (4.0.0)
    rubygems-update (2.0.3)
    safe_yaml (0.7.1)
    syntax (1.0.0)
    test-unit (2.0.0.0)
    yajl-ruby (1.1.0)

I&#39;ve had a lot of problems with my user paths in the past, so I&#39;m wondering if this error could have something to do with that?

Here is the output of `gem env`:

    RubyGems Environment:
      - RUBYGEMS VERSION: 2.0.3
      - RUBY VERSION: 2.0.0 (2013-02-24 patchlevel 0) [x86_64-darwin12.3.0]
      - INSTALLATION DIRECTORY: /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0
      - RUBY EXECUTABLE: /usr/local/Cellar/ruby/2.0.0-p0/bin/ruby
      - EXECUTABLE DIRECTORY: /usr/local/Cellar/ruby/2.0.0-p0/bin
      - RUBYGEMS PLATFORMS:
        - ruby
        - x86_64-darwin-12
      - GEM PATHS:
         - /usr/local/Cellar/ruby/2.0.0-p0/lib/ruby/gems/2.0.0
         - /Users/me/.gem/ruby/2.0.0
      - GEM CONFIGURATION:
         - :update_sources =&gt; true
         - :verbose =&gt; true
         - :backtrace =&gt; false
         - :bulk_threshold =&gt; 1000
      - REMOTE SOURCES:
         - https://rubygems.org/

Here is my &quot;.bash_profile&quot;:

    export PATH=&quot;/usr/local/bin:/usr/local/sbin:~/bin:$PATH&quot;
    
    [[ -s &quot;$HOME/.rvm/scripts/rvm&quot; ]] &amp;&amp; source &quot;$HOME/.rvm/scripts/rvm&quot; # Load RVM into a shell session *as a function*
    PATH=$PATH:above/path/to/gems
    
    source ~/.rvm/scripts/rvm

Could somebody please help me get Jekyll installed, or at least get past this permissions error?


Why do I get a &quot;permission denied&quot; error while installing a gem?

While trying to setup a dropbox folder with git, I saw a &quot;Icon\r&quot; file which is not created by me. I try to ignore it in the ~/.gitignore file. But adding `Icon\r` `Icon\r\r` `Icon?` won&#39;t work at all. 

How to ignore Icon? in git

How can I install gitk on a Mac?

From their official website, it seems gitk comes with Git, but the version of my Git (*git version 1.7.12.4 (Apple Git-37)*) does not come with gitk.

`brew install gitk` does not work for gitk.

Version information (copied from comments):

* [OS X v10.8.2][1] (12C2034) (Mountain Lion)
* [Xcode][2] version 4.6 (4H127)

  [1]: https://en.wikipedia.org/wiki/Git
  [2]: https://en.wikipedia.org/wiki/Xcode


Install gitk on Mac

I have created a new user &#39;dad&#39; on my macbook pro (OSX 10.8.4). &#39;dad&#39; is an administrator. I&#39;ve successfully installed homebrew as &#39;dad&#39;. It was previously installed by another user. I did:

    sudo chown -R dad /usr/local/
    cd /usr/local/
    chmod -R 777 *

But any attempt to install, e.g:

    brew install nmap

Gives:

    Error: Permission denied - /Library/Caches/Homebrew/Formula/nmap.brewing

It seems nmap.brewing doesn&#39;t exist:

    dad$ ls -l /usr/local/Library/Caches/Homebrew/Formula/nmap.brewing
    ls: /usr/local/Library/Caches/Homebrew/Formula/nmap.brewing: No such file or directory

    dad$ ls -l /Library/Caches/Homebrew/Formula/nmap.brewing
    ls: /Library/Caches/Homebrew/Formula/nmap.brewing: No such file or directory

Any ideas?

Permission denied - /Library/Caches/Homebrew/Formula/nmap.brewing

I have installed Hadoop, Hive, Hive JDBC. which are running fine for me. But I still have a problem. How to delete or update a single record using Hive because delete or update command of MySQL is not working in Hive.

Thanks 

    hive&gt; delete from student where id=1;
    Usage: delete [FILE|JAR|ARCHIVE] &lt;value&gt; [&lt;value&gt;]*
    Query returned non-zero code: 1, cause: null


How to delete and update a record in Hive

How to copy file from HDFS to the local file system . There is no physical location of a file under the file , not even directory . how can i moved them to my local for further validations.i am tried through winscp .

How to copy file from HDFS to the local file system

In Hive, when we do a query (like:  `select * from employee`), we do not get any column names in the output (like name, age, salary that we would get in **RDBMS SQL**), we only get the values.
 
Is there any way to get the column names to be displayed along with the output when you execute any query?

Is there any way to get the column name along with the output while execute any query in Hive?

we would like to put the results of a Hive query to a CSV file. I thought the command should look like this:

    insert overwrite directory &#39;/home/output.csv&#39; select books from table;

When I run it, it says it completeld successfully but I can never find the file. How do I find this file or should I be extracting the data in a different way?

How do I output the results of a HiveQL query to CSV?

Are they supposed to be equal?

but, why the &quot;`hadoop fs`&quot; commands show the `hdfs files` while the &quot;`hdfs dfs`&quot; commands show the local files?

here is the hadoop version information:

&gt; Hadoop 2.0.0-mr1-cdh4.2.1 Subversion
&gt; git://ubuntu-slave07.jenkins.cloudera.com/var/lib/jenkins/workspace/CDH4.2.1-Packaging-MR1/build/cdh4/mr1/2.0.0-mr1-cdh4.2.1/source
&gt; -r  Compiled by jenkins on Mon Apr 22 10:48:26 PDT 2013

Content Type	Original Author	Original Content on Stackoverflow
Question	Eugene	View Question on Stackoverflow
Solution 1 - Java	Nelson Menezes	View Answer on Stackoverflow
Solution 2 - Java	Tuxdude	View Answer on Stackoverflow
Solution 3 - Java	EGHM	View Answer on Stackoverflow
Solution 4 - Java	xinthink	View Answer on Stackoverflow

Stop Java Coffee Cup icon from appearing in the Dock on Mac OSX

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Solution 4 - Java

Escaping dollar signs in PowerShell path is not working

Get current dispatch queue?

Attributions