It seems that `Luiggi Mendoza` and `joey rohan` both already answered this, but I think it can be clarified a little. 

You can write it as a single `if` statement:

    if (inventory.contains(&quot;bread&quot;) &amp;&amp; !inventory.contains(&quot;water&quot;)) {
        // do something
    }


Maybe

    if (inventory.contains(&quot;bread&quot;) &amp;&amp; !inventory.contains(&quot;water&quot;))

Or

    if (inventory.contains(&quot;bread&quot;)) {
        if (!inventory.contains(&quot;water&quot;)) {
            // do something here
        } 
    }

For your questions, use below

if(inventory.contains(&quot;bread&quot;) &amp;&amp; !inventory.contains(&quot;water&quot;)) {

    System.out.println(&quot;Bread is there and water not there&quot;);
   
}

else{
    
    System.out.println(&quot;Both or any one condition not met&quot;);
}

Another example: Just use ! sign before contains function.

like if you want to perform some action, like if list does contains say stack then add stack.

       if (!list.contains(&quot;stack&quot;)) {
            list.add(&quot;stack&quot;);
        }`

or another method, if index of search string is -1,

     if(list.indexOf(&quot;stack&quot;)==-1){
        list.add(&quot;stack&quot;);
}

I know we can use the &#39;!&#39; to get the opposite value of the String.contains() function. If you do not want to use the &#39;!&#39; symbol, use the following code:   


    if(inventory.contains(&quot;bread&quot;))
    {
        if(inventory.contains(&quot;water&quot;))
        {
            //do nothing
        }
        else
        {
            //do what you intend to do
        }
    }

 

I installed OpenGL onto my computer running Linux Mint following the instructions on [this tutorial](http://anytimeir.wordpress.com/2012/05/16/installing-opengl-development-environment-in-ubuntu/). I am trying to compile a program that uses OpenGL, but I&#39;m getting a compile error: `fatal error: GL/glew.h: No such file or directory`. I check the /usr/include/GL folder, and glew.h is indeed missing. I don&#39;t know why it&#39;s missing, because I did the command `sudo apt-get install libglew1.5` and it gives the output:

    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    libglew1.5 is already the newest version.
    0 upgraded, 0 newly installed, 0 to remove and 465 not upgraded.

Why is the glew.h file missing?

compiling OpenGL program GL/glew.h missing

While improving the security of an iOS application that we are developing, we found the need to PIN (the entire or parts of) the SSL certificate of server to prevent man-in-the-middle attacks. 

Even though there are various approaches to do this, when you searching for thisI only found  examples for pinning the entire certificate. Such practice poses a problem: As soon as the certificate is updated, your application will not be able to connect anymore. 
If you choose to pin the public key instead of the entire certificate you will find yourself (I believe) in an equally secure situation, while being more resilient to certificate updates in the server. 

But how do you do this?

How to pin the Public key of a certificate on iOS

I have an `if` statement:

    if (inventory.contains(&quot;bread&quot;))

But now I want to check

* if `inventory` contains &quot;bread&quot;
* but does not contain &quot;water&quot;.

How can I do this?

Opposite of .contains (does not contain)

I have an <code>if</code> statement:
<pre><code class="hljs language-arduino">if (inventory.contains("bread"))
</code></pre>
But now I want to check
<ul>
<li>if <code>inventory</code> contains "bread"</li>
<li>but does not contain "water".</li>
</ul>
How can I do this?

I&#39;m trying to format a date in yyyy-MM-dd&#39;T&#39;HH:mm:ss.SSSz format to yyyy-mm-dd HH:mm:ss, which should be easy but I can&#39;t get it to work.

A date that has to be parsed is in the form of: 2012-10-01T09:45:00.000+02:00 &lt;br/&gt;
Now i use this simple  date formatter to format it:

    SimpleDateFormat sdf = new SimpleDateFormat(&quot;yyyy-MM-dd&#39;T&#39;HH:mm:ss.SSSz&quot;, Locale.FRANCE);

yet this gives an output similar to 2012-10-01T09:45:00.000UTC+00:00.

I&#39;ve also tried to use &quot;yyyy-MM-dd&#39;T&#39;HH:mm:ss.SSSZ&quot; as pattern and &quot;yyyy-MM-ddHH:mm:ss&quot;. The latter returns a date in the form of 2012-10-01T09:45:00 close, but not there yet.

I figured substringing the T away would be a bit messy and creates overhead for no reason, thus what would be the proper way to format these dates?

To illustrate I would like to convert 2012-10-01T09:45:00.000+02:00 into 2012-10-01 09:45:00

Cheers!

Java format yyyy-MM-dd&#39;T&#39;HH:mm:ss.SSSz to yyyy-mm-dd HH:mm:ss

I was trying to understand how Java enum really works and I have come to the conclusion that it is very similar to a normal Java class that has its constructor declared private.

I have just come to this conclusion and it isn&#39;t based on much thinking, but Id like to know whether I miss anything.

So below is an implementation of a simple Java enum and an equivalent Java class.

    public enum Direction {
        ENUM_UP(0, -1),
        ENUM_DOWN(0, 1),
        ENUM_RIGHT(1, 0),
        ENUM_LEFT(-1, 0);
        

        private int x;
        private int y;
        
        private Direction(int x, int y){
            this.x = x;
            this.y = y;
        }
        public int getEnumX(){
            return x;
        }
        public int getEnumY(){
            return y;
        }
    }

What is the difference in meaning between the code above and below?

    public class Direction{
        public static final Direction UP = new Direction(0, -1) ;
        public static final Direction DOWN = new Direction(0, 1) ;
        public static final Direction LEFT = new Direction(-1, 0) ;
        public static final Direction RIGHT = new Direction(1, 0) ;


        private int x ;
        private int y ;
    
        private Direction(int x, int y){
            this.x = x ;
            this.y = y ;
        }
        public int getX(){
            return x;
        }
        public int getY(){
            return y;
        }
    }

  

What are the differences between a Java enum and a class with private constructor?

I  have a comma separated file with many lines similar to one below.

    Sachin,,M,&quot;Maths,Science,English&quot;,Need to improve in these subjects.

Quotes is used to escape the delimiter comma used to represent multiple values.

Now how do I split the above value on the comma delimiter using `String.split()` if at all its possible?

Splitting a csv file with quotes as text-delimiter using String.split()

My project has the following structure:
 
    /src/main/java/
    /src/main/resources/
    /src/test/java/
    /src/test/resources/

I have a file in `/src/test/resources/test.csv` and I want to load the file from a unit test in `/src/test/java/MyTest.java` 

I have this code which didn&#39;t work. It complains &quot;No such file or directory&quot;.

    BufferedReader br = new BufferedReader (new FileReader(test.csv))

I also tried this

    InputStream is = (InputStream) MyTest.class.getResourcesAsStream(test.csv))

This also doesn&#39;t work. It returns `null`. I am using Maven to build my project.



How do I load a file from resource folder?

The following code does not produce a file (I can&#39;t see the file anywhere).
What is missing?


    try {
    	//create a temporary file
    	String timeLog = new SimpleDateFormat(&quot;yyyyMMdd_HHmmss&quot;).format(
            Calendar.getInstance().getTime());
    	File logFile=new File(timeLog);
    			
    	BufferedWriter writer = new BufferedWriter(new FileWriter(logFile));
    	writer.write (string);
    			
    	//Close writer
    	writer.close();
    } catch(Exception e) {
    	e.printStackTrace();
    }

How to Write text file Java

Is there a shorter way of writing something like this:
&lt;!-- language-all: lang-cs --&gt;

    if(x==1 || x==2 || x==3) // do something

What I&#39;m looking for is something like this:

    if(x.in((1,2,3)) // do something

Check if a variable is in an ad-hoc list of values

I&#39;ve done some searching and can&#39;t figure out how to filter a dataframe by 

    df[&quot;col&quot;].str.contains(word)

however I&#39;m wondering if there is a way to do the reverse: filter a dataframe by that set&#39;s compliment. eg: to the effect of 

    !(df[&quot;col&quot;].str.contains(word))

Can this be done through a `DataFrame` method?

Search for &quot;does-not-contain&quot; on a DataFrame in pandas

While searching for an answer to this question, I&#39;ve run into similar ones utilizing LINQ but I haven&#39;t been able to fully understand them (and thus, implement them), as I&#39;m not familiarized with it. What I would like to, basically, is this:

1. Check if any element of a list contains a specific string.
2. If it does, get that element.

I honestly don&#39;t know how I would go about doing that. What I can come up with is this (not working, of course):

    if (myList.Contains(myString))
        string element = myList.ElementAt(myList.IndexOf(myString));

I know WHY it does not work:

- `myList.Contains()` does not return `true`, since it will check for if a whole element of the list matches the string I specified.
- `myList.IndexOf()` will not find an occurrence, since, as it is the case again, it will check for an element matching the string.

Still, I have no clue how to solve this problem, but I figure I&#39;ll have to use LINQ as suggested in similar questions to mine. That being said, if that&#39;s the case here, I&#39;d like for the answerer to explain to me the use of LINQ in their example (as I said, I haven&#39;t bothered with it in my time with C#). Thank you in advance guys (and gals?).

EDIT: I have come up with a solution; just loop through the list, check if current element contains the string and then set a string equal to the current element. I&#39;m wondering, though, is there a more efficient way than this?

    string myString = &quot;bla&quot;;
    string element = &quot;&quot;;

    for (int i = 0; i &lt; myList.Count; i++)
    {
        if (myList[i].Contains(myString))
            element = myList[i];
    }



Check if list contains element that contains a string and get that element

I want to check whether a `List` contains an object that has a field with a certain value. Now, I could use a loop to go through and check, but I was curious if there was anything more code efficient. 

Something like;

    if(list.contains(new Object().setName(&quot;John&quot;))){
        //Do some stuff
    }

I know the above code doesn&#39;t do anything, it&#39;s just to demonstrate roughly what I am trying to achieve.

Also, just to clarify, the reason I don&#39;t want to use a simple loop is because this code will currently go inside a loop that is inside a loop which is inside a loop. For readability I don&#39;t want to keep adding loops to these loops. So I wondered if there were any simple(ish) alternatives.

Java List.contains(Object with field value equal to x)

I have an R string, with the format

    s = `&quot;[some letters and numbers]_[a number]_[more numbers, letters, punctuation, etc, anything]&quot;`

I simply want a way of checking if `s` contains `&quot;_2&quot;` in the first position. In other words, after the first `_` symbol, is the single number a &quot;2&quot;? How do I do this in R?

I&#39;m assuming I need some complicated regex expresion?

Examples:

    39820432_2_349802j_32hfh = TRUE

`43lda821_9_428fj_2f = FALSE` (notice there is a `_2` there, but not in the right spot)

Content Type	Original Author	Original Content on Stackoverflow
Question	Tizer1000	View Question on Stackoverflow
Solution 1 - Java	Itsan Alias	View Answer on Stackoverflow
Solution 2 - Java	joey rohan	View Answer on Stackoverflow
Solution 3 - Java	Ashish Gupta	View Answer on Stackoverflow
Solution 4 - Java	Sardaar54	View Answer on Stackoverflow

Opposite of .contains (does not contain)

Java Problem Overview

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How to pin the Public key of a certificate on iOS

compiling OpenGL program GL/glew.h missing

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