If you only want to set the default timezone for joda time, use [`DateTimeZone.setDefault`][1].

----

If you want to change the timezone that the *whole jvm* uses use [`TimeZone.setDefault`][2] method. Just be sure to set it early as it can be cached by joda time.. quoted from [DateTimeZone.getDefault][3]:

&gt; The default time zone is derived from the system property user.timezone. If that is null or is not a valid identifier, then the value of the JDK TimeZone default is converted. If that fails, UTC is used. 


  [1]: http://joda-time.sourceforge.net/apidocs/org/joda/time/DateTimeZone.html#setDefault%28org.joda.time.DateTimeZone%29
  [2]: http://docs.oracle.com/javase/1.4.2/docs/api/java/util/TimeZone.html#setDefault%28java.util.TimeZone%29
  [3]: http://joda-time.sourceforge.net/apidocs/org/joda/time/DateTimeZone.html#getDefault%28%29

If you are really concerned about the extra chars, then just create a helper method:

    public static DateTime newUTCDateTime() {
      return new DateTime(DateTimeZone.UTC);
    }

I have been using `NSURLConnection&#39;s` `sendAsynchronousRequest:queue:completionHandler:` method which is great. But, I now need to make multiple requests in a row.

How can I do this while still using this great asychronous method?

NSURLConnection sendAsynchronousRequest:queue:completionHandler: making multiple requests in a row?

I see some similar questions here (like https://stackoverflow.com/questions/6806271/javascript-check-if-ctrl-button-was-pressed) but my problem is actually the event triggering. My js code:

        // Listen to keyboard. 
        window.onkeypress = listenToTheKey;
        window.onkeyup = listenToKeyUp;
                
        /*
            Gets the key pressed and send a request to the associated function
            @input key
        */
        function listenToTheKey(e)
		{
			if (editFlag == 0)
			{
				// If delete key is pressed calls delete
                if (e.keyCode == 46)
					deleteNode();
                
                // If insert key is pressed calls add blank
                if (e.keyCode == 45)
                    createBlank();
                
                if (e.keyCode == 17)
                    ctrlFlag = 1;
            }
        }

The event triggers for any other keys except the &lt;kbd&gt;ctrl&lt;/kbd&gt;.  
I need to also trigger it for &lt;kbd&gt;ctrl&lt;/kbd&gt;.  
I can&#39;t use jQuery/prototype/whatever so those solutions are not acceptable.

So... how can I detect the &lt;kbd&gt;ctrl&lt;/kbd&gt;?

javascript - detect ctrl key pressed or up, keypress event doesn&#39;t trigger

I am currently creating UTC DateTime objects using the current idiom

    DateTime now = new DateTime(DateTimeZone.UTC);

Is there any way to default so I can create UTC-based DateTime objects using the default constructor so it is more implicit?

    DateTime now = new DateTime();

Defaulting date time zone to UTC for Jodatime&#39;s DateTime

I am currently creating UTC DateTime objects using the current idiom
<pre><code class="hljs language-ini">DateTime now = new DateTime(DateTimeZone.UTC);
</code></pre>
Is there any way to default so I can create UTC-based DateTime objects using the default constructor so it is more implicit?
<pre><code class="hljs language-ini">DateTime now = new DateTime();
</code></pre>

I have 3 classes:

    public class Alpha {
        public Number number;
    }
    
    public class Beta extends Alpha {
        public String number;
    }
    
    public class Gama extends Beta {
        public int number;
    }

Why does the following code compile? And, why does the test pass without any runtime errors?

    @Test
    public void test() {
        final Beta a = new Gama();
        a.number = &quot;its a string&quot;;
        ((Alpha) a).number = 13;
        ((Gama) a).number = 42;
    
        assertEquals(&quot;its a string&quot;, a.number);
        assertEquals(13, ((Alpha) a).number);
        assertEquals(42, ((Gama) a).number);
    }

If you overwrite a field in a subclass of a class, the subclass has two fields with the same name(and different type)?

I am trying to resized a bufferedimage. I am able to store it and show up on a jframe no problems but I can&#39;t seem to resize it. Any tips on how I can change this to make it work and show the image as a 200*200 file would be great    

    private void profPic(){
        String path = factory.getString(&quot;bottle&quot;);
        BufferedImage img = ImageIO.read(new File(path));
    }


    public static BufferedImage resize(BufferedImage img, int newW, int newH) {  
        int w = img.getWidth();  
        int h = img.getHeight();  
        BufferedImage dimg = new BufferedImage(newW, newH, img.getType());  
        Graphics2D g = dimg.createGraphics();  
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_BILINEAR);  
        g.drawImage(img, 0, 0, newW, newH, 0, 0, w, h, null);  
        g.dispose();  
        return dimg;  
    }  

Bufferedimage resize

I&#39;m trying to use [Lombok][1] in my project that I&#39;m developing using IntelliJ IDEA 11.

I&#39;ve installed [3rd-party plugin for IDEA][2] and it seems working fine because IDEA sees all autogenerated methods/fields.

So I have a class that uses Slf4j. I annotated it like this

    import lombok.extern.slf4j.Slf4j;

    @Slf4j
    public class TestClass
    {
        public TestClass()
        {
            log.info(&quot;Hello!&quot;);
        }
    }

But when I build my project compiler spits: `cannot find symbol variable log`.

Could you please tell me what I&#39;m missing here?

**Update:** It turned out it&#39;s RequestFactory annotation process that fails.

    input files: {com.zasutki.courierApp.server.TestServlet, com.mine.courierApp.server.model.DatastoreObject}

    annotations: [javax.inject.Singleton, javax.inject.Inject, lombok.Getter, lombok.Setter, com.googlecode.objectify.annotation.Id, com.googlecode.objectify.annotation.OnSave]

    Processor com.google.web.bindery.requestfactory.apt.RfValidator matches [lombok.Getter, com.googlecode.objectify.annotation.Id, javax.inject.Inject, lombok.Setter, com.googlecode.objectify.annotation.OnSave, javax.inject.Singleton] and returns false.

    cannot find symbol variable log

Any ideas on workarounds?

**Update2:** Perhaps it&#39;s not something readers want to hear but I ended up switching to [Scala][3].


  [1]: http://projectlombok.org/
  [2]: http://code.google.com/p/lombok-intellij-plugin/
  [3]: http://en.wikipedia.org/wiki/Scala_%28programming_language%29

Can&#39;t compile project when I&#39;m using Lombok under IntelliJ IDEA

I&#39;m running a web application on Tomcat. I have a class that handles all DB queries.
This class contains the `Connection` object and methods that returns query results.

This is the connection object:

    private static Connection conn = null;

It has only one instance (singleton).

In addition, I have methods that execute queries, such as search for a user in the db:

    public static ResultSet searchUser(String user, String pass) throws SQLException

This method uses the static `Connection` object. My question is, is my use in static `Connection` object thread safe? Or can it cause problems when a lot of users will call the `searchUser` method?



Is it safe to use a static java.sql.Connection instance in a multithreaded system?

I used `ToStringBuilder.reflectionToString(class)` in commons-lang, to implement `toString()` for simple DTOs. Now I&#39;m trying to use Google Guava instead of Apache commons library. And I found `Objects.ToStringHelper` in Guava. But it&#39;s too verbose if there&#39;re lots of members in the class. For example:

	@Override
	public String toString() {
		return MoreObjects.toStringHelper(this.getClass()).add(&quot;name&quot;, name)
				.add(&quot;emailAddress&quot;, emailAddress)
				.add(&quot;department&quot;, department).add(&quot;yearJoined&quot;, yearJoined)
				.toString();
	}

is much simpler if I use commons-lang:

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }

Is there any better ways to implement `toString()` with Guava, not with commons-lang?

[Guava docs][1]

  [1]: https://google.github.io/guava/releases/snapshot/api/docs/com/google/common/base/MoreObjects.html

Using Google Guava&#39;s Objects.ToStringHelper

I need to get the first date (as `org.joda.time.LocalDate`) of a month and the last one. Getting the first is trivial, but getting the last seems to need some logic as months have different length and February length even varies over years. Is there a mechanism for this already built in to JodaTime or should I implement it myself?

How to get the last date of a particular month with JodaTime?

Is the [Joda-Time][1] `DateTimeFormatter` class [thread safe][2]? Once I get an instance from `DateTimeFormat.forPattern`, can its various parse methods be called by multiple threads? DateTimeFormatter&#39;s [Javadocs][3] makes no mention of thread safety.


  [1]: http://www.joda.org/joda-time/
  [2]: https://en.wikipedia.org/wiki/Thread_safety
  [3]: http://www.joda.org/joda-time/apidocs/org/joda/time/format/DateTimeFormatter.html

Is Joda-Time DateTimeFormatter class thread safe?

Below is the method I wrote: 

    public List&lt;Map&lt;String, Object&gt;&gt; loadNotYetInEmployee(int shift, Date date,
            int transitionVal, String type, User user) {

        DateTime datetime = new DateTime(date);
        datetime = datetime
                .plus(Period.minutes(shiftTiming.getSession1InTime()));

        List&lt;Map&lt;String, Object&gt;&gt; result = new ArrayList&lt;Map&lt;String, Object&gt;&gt;();

        sql = SqlMapUtils.getSql(&quot;attendance.attendancestatus.latein&quot;,
                parameters);
        result = getJdbcTemplate().queryForList(sql);
        for (int i = 0; i &lt; result.size(); i++) {
            Date punchInTime = (Date) result.get(i).get(&quot;punchtime&quot;);
            DateTime punchTime = new DateTime(punchInTime);
        }
        return result;
    }


Now from my method you can see I have a [Joda-Time][1] [DateTime][2] object in object named `datetime` and from my result I am getting one timestamp which I am converting to jodatime `punchTime`. Now I want to find out the diff between these two dates, how do I do that?



  [1]: http://www.joda.org/joda-time/
  [2]: http://www.joda.org/joda-time/apidocs/org/joda/time/DateTime.html

How to find difference between two Joda-Time DateTimes in minutes

I&#39;m adding the Joda Time repository to SBT with

    libraryDependencies ++= Seq(
      &quot;joda-time&quot;         % &quot;joda-time&quot;           % &quot;2.1&quot;
    )

Then I merrily use it like this:

     val ymd = org.joda.time.format.DateTimeFormat.forPattern(&quot;yyyyMMdd&quot;)
      ymd.parseDateTime(&quot;20121212&quot;)

But, when I compile the project in SBT, I get a nasty:

    [warn] Class org.joda.convert.FromString not found - continuing with a stub.
    [warn] Caught: java.lang.NullPointerException while parsing annotations in /home/jack/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.1.jar(org/joda/time/DateTime.class)
    [error] error while loading DateTime, class file &#39;/home/jack/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.1.jar(org/joda/time/DateTime.class)&#39; is broken
    [error] (class java.lang.RuntimeException/bad constant pool tag 10 at byte 42)

I tried the 2.0 version of joda-time, but get the same error.


Class broken error with Joda Time using Scala

Is it possible to do that? If yes, then how do I do the conversion from [Joda-Time][1] to [Date][2] and vice versa?


  [1]: http://www.joda.org/joda-time/
  [2]: http://docs.oracle.com/javase/7/docs/api/java/util/Date.html

Content Type	Original Author	Original Content on Stackoverflow
Question	algolicious	View Question on Stackoverflow
Solution 1 - Java	dacwe	View Answer on Stackoverflow
Solution 2 - Java	jtahlborn	View Answer on Stackoverflow

Defaulting date time zone to UTC for Jodatime's DateTime

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

javascript - detect ctrl key pressed or up, keypress event doesn't trigger

NSURLConnection sendAsynchronousRequest:queue:completionHandler: making multiple requests in a row?

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