Try the following:

    javac file1.java file2.java

or you can use the following to compile the all java source files in current directory..

    javac *.java

Here is another example, for compiling a java file in a nested directory.

I was trying to build this from the command line. This is an example from &#39;gradle&#39;, which has dependency &#39;commons-collection.jar&#39;. For more info, please see &#39;[gradle: java quickstart](https://docs.gradle.org/1.11/userguide/tutorial_java_projects.html)&#39; example.  -- of course, you would use the &#39;gradle&#39; tools to build it. But i thought to extend this example, for a nested java project, with a dependent jar.

**Note:** You need the &#39;gradle binary or source&#39; distribution for this, example code is in: &#39;samples/java/quickstart&#39;

    % mkdir -p temp/classes
    % curl --get \
        http://central.maven.org/maven2/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar \
            --output commons-collections-3.2.2.jar

    % javac -g -classpath commons-collections-3.2.2.jar \
         -sourcepath src/main/java -d temp/classes \
          src/main/java/org/gradle/Person.java 

    % jar cf my_example.jar -C temp/classes org/gradle/Person.class
    % jar tvf my_example.jar
       0 Wed Jun 07 14:11:56 CEST 2017 META-INF/
      69 Wed Jun 07 14:11:56 CEST 2017 META-INF/MANIFEST.MF
     519 Wed Jun 07 13:58:06 CEST 2017 org/gradle/Person.class



1.[use wildcard][1]


2.[use options][2]

3.https://docs.oracle.com/javase/8/docs/technotes/tools/windows/javac.html

  [1]: https://i.stack.imgur.com/lln2q.png
  [2]: https://i.stack.imgur.com/57O6G.png



OR you could just use `javac file1.java` and then also use `javac file2.java` afterwards.

It seems that in November, Apple updated both the [NSManagedObjectContext Class Reference][1] and the [Core Data Programming Guide][2] documents to explicitly bless serial GCD Dispatch Queues and  NSOperationQueues as acceptable mechanisms for synchronising access to a `NSManagedObjectContext`. But their advice seems ambiguous and possibly contradictory, and I want to make sure I&#39;ve understood it properly.

Previously the accepted wisdom seemed to be that a `NSManagedObjectContext` could only be accessed from the thread that created it, and that using a serial queue for synchronisation was not sufficient; although serial queues only perform one operation at a time, these operations can potentially be scheduled on different threads, and a MOC doesn&#39;t like that.

But now, from the programming guide, we have:
&gt; You can use threads, serial operation queues, or dispatch queues for concurrency. For the sake of conciseness, this article uses “thread” throughout to refer to any of these.

So far, so good (although their conflation of threads and queues is unhelpful). So I can safely use a single context per (serial) queue, instead of one per operation/block, right? Apple even has a visual depiction of this in the Core Data WWDC sessions.

But... where do you create the context for the queue? In the `NSManagedObjectContext` documentation, Apple state:
&gt; [A context] assumes the default owner is the thread or queue that allocated it—this is determined by the thread that calls its init method. You should not, therefore, initialize a context on one thread then pass it to a different thread.

So now we have the idea of a `NSManagedObjectContext` needing to know who its owner is. I&#39;m assuming this means that the first operation to be executed in the queue should create the MOC and save a reference to it for the remaining operations to use.

Is this right? The only reason I&#39;m hesitant is that the `NSManagedObjectContext` article goes on to say:
&gt; Instead, you should pass a reference to a persistent store coordinator and have the receiving thread/queue create a new context derived from that. If you use NSOperation, you must create the context in main (for a serial queue) or start (for a concurrent queue).

Apple now seem to be conflating operations with the queues that schedule their execution. This does my head in, and makes me wonder if they really do want you to just create a new MOC for every operation after all. What am I missing?

  [1]: http://developer.apple.com/library/mac/#documentation/cocoa/Reference/CoreDataFramework/Classes/NSManagedObjectContext_Class/NSManagedObjectContext.html%23//apple_ref/doc/uid/TP30001182-DontLinkElementID_1
  [2]: http://developer.apple.com/library/mac/documentation/cocoa/Conceptual/CoreData/Articles/cdConcurrency.html#//apple_ref/doc/uid/TP40003385-SW1

What does Apple mean when they say that a NSManagedObjectContext is owned by the thread or queue that created it?

I have a form that goes through an endless loop and processes data. When I click a button that &quot;closes&quot; the form, the form keeps processing even though it is closed. I want the form to completely end and exit out of its loop statement, and then open a new form.

Here is the code I am using to close the form

    frmMain.Close()
    frmMain.Dispose()

Note: I am not using threads it&#39;s just a simple [VB.NET][1] application. I am not closing the main startup form.

  [1]: http://en.wikipedia.org/wiki/Visual_Basic_.NET


VB.NET - Interrupt form loop and end form

I know running `javac file1.java` produces `file1.class` if `file1.java` is the only source file, then I can just say `java file1` to run it.

However, if I have 2 source files, `file1.java` and `file2.java`, then how  do I build the program?




How to compile multiple java source files in command line

<p>I know running <code>javac file1.java</code> produces <code>file1.class</code> if <code>file1.java</code> is the only source file, then I can just say <code>java file1</code> to run it.</p>
<p>However, if I have 2 source files, <code>file1.java</code> and <code>file2.java</code>, then how  do I build the program?</p>


So in a `BufferedImage`, you receive a single integer that has the RGB values represented in it. So far I use the following to get the RGB values from it:

    // rgbs is an array of integers, every single integer represents the
    // RGB values combined in some way
    int r = (int) ((Math.pow(256,3) + rgbs[k]) / 65536);
    int g = (int) (((Math.pow(256,3) + rgbs[k]) / 256 ) % 256 );
    int b = (int) ((Math.pow(256,3) + rgbs[k]) % 256);

And so far, it works.

What I need to do is **figure out how to get an integer** so I can use `BufferedImage.setRGB()`, because that takes the same type of data it gave me.

Convert RGB values to Integer

I am trying to add an image to a JButton and I&#39;m not sure what I&#39;m missing. When I run the following code the button looks exactly the same as if I had created it without any image attribute. Water.bmp is in the root of my project folder. 

    ImageIcon water = new ImageIcon(&quot;water.bmp&quot;);
		JButton button = new JButton(water);
		frame.add(button);



How do I add an image to a JButton

What is the use of `Collections.singletonList()` in Java? I understand that it returns a list with one element. Why would I want to have a separate method to do that? How does immutability play a role here?

Are there any special useful use-cases for this method rather than just being a convenient method?

Use of Java&#39;s Collections.singletonList()?

I tried to use the _File class_ to create an empty file in a directory like &quot;C:/Temp/Emptyfile&quot;.
However, when I do that, it shows me an error : &quot;already made folder Temp&quot;. Otherwise, it won&#39;t create one for me.

So, how do I literally create folders with java API?

How to create empty folder in java?

What is the difference between `null` and the `&quot;&quot;` (empty string)?

I have written some simple code:

    String a = &quot;&quot;;
    String b = null;
    
    System.out.println(a == b); // false
    System.out.println(a.equals(b)); // false

Both statements return `false`. It seems, I am not able to find what is the actual difference between them.

Difference between null and empty (&quot;&quot;) Java String

If I press &lt;kbd&gt;F5&lt;/kbd&gt;, my project runs but it doesn&#39;t &quot;see&quot; any of the changes that I made. I need to manually (re)build before pressing &lt;kbd&gt;F5&lt;/kbd&gt; for it to work.

It worked well previously. Any idea what I need to change?

Why doesn&#39;t F5 rebuild project before execution in Visual Studio?

I have a Visual Studio 2010 solution with a few projects. I can successfully build with Build -&gt; Build Solution or Build -&gt; Build MyCompany.MyProduct.MyProject. After building I press CTRL+F5 and successfully run the start up project. This works as expected.

After I change a source file, save it and then again build (with either Build -&gt; Build Solution or Build -&gt; Build MyCompany.MyProduct.MyProject) it builds successfully. I am still able to press CTRL+F5 and run the startup project. This again works as expected.

The problem is in the following scenario:
After I change a source file, save it and directly press CTRL+F5 then Visual Studio 2010 says BUILD FAILED and there are no errors. And it doesn&#39;t start my startup project (of course).

Am I missing something?

Visual Studio 2010 says Build failed with no errors after I change a source file

I receive the following warning:

    [javac] build.xml:9: warning: &#39;includeantruntime&#39; was not set, 
    defaulting to build.sysclasspath=last; set to false for repeatable builds

What does this mean?



ant warning: &quot;&#39;includeantruntime&#39; was not set&quot;

I have two projects, project A and Project B. Both are written in groovy and use gradle as their build system. 

Project A requires project B. 
This holds for both the compile and test code. 

How can I configure that the test classes of project A have access to the test classes of project B?

Gradle Test Dependency

I&#39;m just starting to use Xcode 4, and I&#39;m trying to find the file in a project where it stores all of a project&#39;s Schemes. I figured they would be stored in a file in the xcodeproj directory somewhere, but for the life of me I can&#39;t find which one.

All of my projects are stored on an SVN server, and I&#39;d like to keep Scheme info with the project. Right now when you check out a project fresh, the Schemes don&#39;t make it along with.

EDIT: After playing with this a bit more, it appears that Schemes are stored each as separate files in xcuserdata/user.xcuserdata/xschemes/MyScheme.xscheme with a xcschememanagement.plist file to keep them all sorted.

So my new question, is there a way to store these in a per-project scope instead of a per-user scope? This way when another developer opens the same project, he&#39;ll see the same schemes I set up?

Where does Xcode 4 store Scheme Data?

I get this error when I compile my java program: 

    error: Class names, &#39;EnumDevices&#39;, are only accepted if annotation 
    processing is explicitly requested
    1 error

Here is the java code (I&#39;m running this on Ubuntu).

    import jcuda.CUDA;    
    import jcuda.driver.CUdevprop;    
    import jcuda.driver.types.CUdevice;
    
    public class EnumDevices {
    
      public static void main(String args[]) {
   		 CUDA cuda = new CUDA(true);    
    		int count = cuda.getDeviceCount();
       
    		System.out.println(&quot;Total number of devices: &quot; + count);
    
    		for (int i = 0; i &lt; count; i++) {
    
    		  CUdevice dev = cuda.getDevice(i);
    		  String name = cuda.getDeviceName(dev);
    		  System.out.println(&quot;Name: &quot; + name);
    		  int version[] = cuda.getDeviceComputeCapability(dev);
    
    		  System.out.println(&quot;Version: &quot; + 
    		      String.format(&quot;%d.%d&quot;, version[0], version[1]));
    		  CUdevprop prop = cuda.getDeviceProperties(dev);
    		  System.out.println(&quot;Clock rate: &quot; + prop.clockRate + &quot; MHz&quot;);
    		  System.out.println(&quot;Threads per block: &quot; + prop.maxThreadsPerBlock);
    		}
    	}
    }

Here is the javac command:

    javac -cp /home/manish.yadav/Desktop/JCuda-All-0.3.2-bin-linux-x86_64 EnumDevices

How do I compile this program?

javac error: Class names are only accepted if annotation processing is explicitly requested

I have installed java in my *CentOS release 5.5* machine using the command `yum install java`. But I am unable to compile a class using javac.

Do I need to install any other package? 

I have tried to locate the `javac` executable but i am unable to locate it.

`/usr/bin/java` is linked as follows:  
`/usr/bin/java` -&gt; `/etc/alternatives/java`  
`/etc/alternatives/java` -&gt; `/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java`

I have seen the following output by `yum list installed |grep java`:

    java-1.6.0-openjdk.x86_64              1:1.6.0.0-1.16.b17.el5          installed
    tzdata-java.x86_64                     2011b-1.el5                     installed


javac : command not found

Recently, I was reading this [article][1].

According to that article, Java Compiler i.e. javac does not perform any optimization while generating bytecode. Is it really true? If so, then can it be implemented as an intermediate code generator to remove redundancy and generate optimal code?


  [1]: http://www.ibm.com/developerworks/ibm/library/it-haggar_bytecode/

Optimization by Java Compiler

I am using the javac compiler to compile java files in my project. The files are distributed over several packages like this: `com.vistas.util`, `com.vistas.converter`, `com.vistas.LineHelper`, `com.current.mdcontect`.

Each of these packages has several java files. I am using javac like this:

&lt;!-- language: none --&gt;

    javac com/vistas/util/*.java com/vistas/converter/*.java
          com.vistas.LineHelper/*.java com/current/mdcontect/*.java

(in one line)
 
Instead of giving so many paths, how can I ask the compiler to compile recursively all the java files from the parent com directory?

Content Type	Original Author	Original Content on Stackoverflow
Question	Alfred Zhong	View Question on Stackoverflow
Solution 1 - Java	ryanprayogo	View Answer on Stackoverflow
Solution 2 - Java	ajduke	View Answer on Stackoverflow
Solution 3 - Java	huch	View Answer on Stackoverflow
Solution 4 - Java	xt j	View Answer on Stackoverflow
Solution 5 - Java	Ryan Weiland	View Answer on Stackoverflow

How to compile multiple java source files in command line

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VB.NET - Interrupt form loop and end form

What does Apple mean when they say that a NSManagedObjectContext is owned by the thread or queue that created it?

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