This answer is probably a little late but:

http://akuma.kohsuke.org/

seems to be exactly what your looking for

Funnily, I am just working on this: a Java process running other Java processes. I used the article [From Runtime.exec() to ProcessBuilder](https://www.java-tips.org/java-se-tips-100019/88888889-java-util/426-from-runtimeexec-to-processbuilder.html) as a solid base, and [When Runtime.exec() won&#39;t](http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html) as a good advice how to gobble the output streams.

PS.: For those wondering, I had to do that (instead of spawning new threads) because yet another Java process is checking the presence of these processes which are, normally, ran separately with shell commands.

The [Application Isolation API (JSR 121)](https://jcp.org/en/jsr/detail?id=121) introduces `Isolate` which addresses this use case.

It there any way to show two editing windows in visual studio? I would like to look at two source files at the same time but I must be missing the option to do that.  

Split edit window in Visual Studio

I&#39;m quite confused about the basic concepts of a Hash table. If I were to code a hash how would I even begin? What is the difference between a Hash table and just a normal array? 

Basically if someone answered this question I think all my questions would be answered:
If I had 100 randomly generated numbers (as keys), how would I implement a hash table and why would that be advantageous over an array?

Psuedo-code or Java would be appreciated as a learning tool...

The fundamentals of Hash tables?

Is it possible to do  a &quot;C like&quot; fork in java, using an new independent jvm process ?

How?



Java - C-Like Fork?

<p>Is it possible to do  a "C like" fork in java, using an new independent jvm process ?</p>
<p>How?</p>


I want to discover at run-time ONLY the static Methods of a class, how can I do this?
Or, how to differentiate between static and non-static methods.

How can I check if a method is static using reflection?

Is there anyway to get Eclipse to automatically look for static imports? For example, now that I&#39;ve finally upgraded to Junit 4, I&#39;d like to be able to write:

    assertEquals(expectedValue, actualValue);

hit &lt;kbd&gt;Ctrl&lt;/kbd&gt; + &lt;kbd&gt;Shift&lt;/kbd&gt; + &lt;kbd&gt;O&lt;/kbd&gt; and have Eclipse add:

    import static org.junit.Assert.assertEquals;

Maybe I&#39;m asking too much.


Eclipse Optimize Imports to Include Static Imports

I&#39;m making a Java application with an application-logic-thread and a database-access-thread.
Both of them persist for the entire lifetime of the application and both need to be running at the same time (one talks to the server, one talks to the user; when the app is fully started, I need *both* of them to work).

However, on startup, I need to make sure that initially the app thread waits until the db thread is ready (currently determined by polling a custom method `dbthread.isReady()`).
I wouldn&#39;t mind if app thread blocks until the db thread was ready.

`Thread.join()` doesn&#39;t look like a solution - the db thread only exits at app shutdown.

`while (!dbthread.isReady()) {}` kind of works, but the empty loop consumes a lot of processor cycles.

Any other ideas? Thanks.

How to make a Java thread wait for another thread&#39;s output?

What is the equivalent of Java&#39;s `System.currentTimeMillis()` in C#?

Java System.currentTimeMillis() equivalent in C#

The very common beginner mistake is when you try to use a class property &quot;statically&quot; without making an instance of that class. It leaves you with the mentioned error message:

&gt; You can either make the non static method static or make an instance of that class to use its properties.

**What the reason behind this? Am not concern with the solution, rather the reason.**

    private java.util.List&lt;String&gt; someMethod(){
    	/* Some Code */
    	return someList;    		
    }
    
    public static void main(String[] strArgs){      	
         // The following statement causes the error. 
    	java.util.List&lt;String&gt; someList = someMethod();   		
    }

What is the reason behind &quot;non-static method cannot be referenced from a static context&quot;?

I long thought that in C, all variables had to be declared at the beginning of the function. I know that in C99, the rules are the same as in C++, but what are the variable declaration placement rules for C89/ANSI C?

The following code compiles successfully with `gcc -std=c89` and `gcc -ansi`:

    #include &lt;stdio.h&gt;
    int main() {
        int i;
        for (i = 0; i &lt; 10; i++) {
            char c = (i % 95) + 32;
            printf(&quot;%i: %c\n&quot;, i, c);
            char *s;
            s = &quot;some string&quot;;
            puts(s);
        }
        return 0;
    }

Shouldn&#39;t the declarations of `c` and `s` cause an error in C89/ANSI mode?

Variable declaration placement in C

How do I get the HTTP status code (eg 200 or 500) after calling curl\_easy\_perform?  

Http status code with libcurl?

How can I pad a string with spaces on the left when using printf?

For example, I want to print &quot;Hello&quot; with 40 spaces preceding it.

Also, the string I want to print consists of multiple lines.  Do I need to print each line separately?

EDIT: Just to be clear, I want exactly 40 spaces printed before every line.

Left-pad printf with spaces

We had a discussion here at work regarding why _fread()_ and _fwrite()_ take a size per member and count and return the number of members read/written rather than just taking a buffer and size. The only use for it we could come up with is if you want to read/write an array of structures which aren&#39;t evenly divisible by the platform alignment and hence have been padded but that can&#39;t be so common as to warrant this choice in design.

From [fread(3)](https://man7.org/linux/man-pages/man3/fread.3.html):

&gt;The function fread() reads nmemb elements of data, each size bytes long,
&gt;from the stream pointed to by stream, storing them at the location given
&gt;by ptr.
    
&gt;The  function  fwrite()  writes  nmemb elements of data, each size bytes
&gt;long, to the stream pointed to by stream, obtaining them from the location
&gt;given by ptr.
    
&gt;fread() and fwrite() return the number of items successfully read or written
&gt;(i.e., not the number of characters).  If an error occurs, or  the
&gt;end-of-file is reached, the return value is a short item count (or zero).

What is the rationale for fread/fwrite taking size and count as arguments?

I&#39;m learning about Win32 programming, and the `WinMain` prototype looks like:

    int WINAPI WinMain ( HINSTANCE instance, HINSTANCE prev_instance, PSTR cmd_line, int cmd_show )

I was confused as to what this `WINAPI` identifier was for and found:

    #define WINAPI      __stdcall

What does this do?  I&#39;m confused by this having something at all after a return type.  What is `__stdcall` for?  What does it mean when there is something between the return type and function name?

   


What is __stdcall?

In many programs and man pages of Linux, I have seen code using `fork()`. Why do we need to use `fork()` and what is its purpose?


What is the purpose of fork()?

I guess the question says it all.

I want to fork on Windows. What is the most similar operation and how do I use it.

What is the closest thing Windows has to fork()?

I would like to make a section of my code more efficient. I&#39;m thinking of making it fork off into multiple processes and have them execute 50/100 times at once, instead of just once. 

For example (pseudo):

    for line in file;
    do 
    foo;
    foo2;
    foo3;
    done

I would like this for loop to run multiple times. I know this can be done with forking. Would it look something like this?

    while(x &lt;= 50)
    parent(child pid)
    {
       fork child()
    }
    child
    {
       do 
       foo; foo2; foo3; 
       done
       return child_pid()
    }

Or am I thinking about this the wrong way?

Thanks!


Forking / Multi-Threaded Processes | Bash

I&#39;ve found myself twice in this situation: I install a gem on my system and start using it from my Rails project. Eventually I need to make some changes to that gem. How should I proceed?

Ideally I&#39;d like to check out the source code of that gem somewhere, like ~/third_party/gems, work on it and have my Rails project use that instead. Is that possible?

In all the cases the gems were at github so I would probably for it at github, clone it, make my chances and maintain my own branch. I suppose then I would install that branch directly with gem install on my server. Does that make sense?

Forking a gem for a Rails project

What are the differences between `fork` and `exec`?





Content Type	Original Author	Original Content on Stackoverflow
Question	sakana	View Question on Stackoverflow
Solution 1 - Java	user525362	View Answer on Stackoverflow
Solution 2 - Java	PhiLho	View Answer on Stackoverflow
Solution 3 - Java	Markus Malkusch	View Answer on Stackoverflow

Java - C-Like Fork?

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

The fundamentals of Hash tables?

Split edit window in Visual Studio

Attributions