<div>
 
You can first read your properties from file and then do something like that: 
 

<pre><code class="code-10 nolinks" id="code-20-36347684-1">Properties p = new Properties();
p.load(new FileInputStream(&quot;filename.properties&quot;));
Set s = p.keySet();
boolean isLocalIP = false;
Iterator itr = s.interator();

while(itr.hasNext()){
String str = (String) itr.next();
String ipAdd = (String) p.getProperty(str);
if(localIP.equals(ipAdd)){
isLocalIP = true;
break;
}

}
</code></pre>
 
and then in your code you just make one condition 
&nbsp; &amp;&amp;&nbsp;!isLocalIP &amp;&amp; 
 
 
Mind that you should never &nbsp;compare Strings in Java in this way: 
localIP != &quot;142.139.24.12&quot; 
 
you need to use equals method 
 
&nbsp; &nbsp;!(localIP.equals(&quot;142.139.24.12&quot;)) 
 
otherwise there may be really bad mistakes 
 
 
 

</div>

<div>
&gt;&gt;Now in the code how do call that and tell the app to ignore every IP in that file? 
 
You can just use &quot;containsValue()&quot; method of Hashtable, which is extended by java.util.Properties, to check if the ip is existing. 
 
<a href="http://download.oracle.com/javase/1.4.2/docs/api/java/util/Hashtable.html#containsValue%28java.lang.Object%29" rel="ugc">http://download.oracle.com/javase/1.4.2/docs/api/java/util/Hashtable.html#containsValue%28java.lang.Object%29</a> 
 

<pre><code class="code-1 nolinks" id="code-8198927">Properties p = new Properties();
p.load(new FileInputStream(&quot;filename.properties&quot;));
if(p.containsValue()){
//ip is existing in the file, do something
}else{
//do something else.
}
</code></pre>
</div>

<div>
for_yan.... So the example of a properties file that looks like below is a bad idea?: 
# Redundant IP's in the test/UA environment as of 2011-08-10 
ClientChooser.IP=149.139.24.12 &nbsp; 
PaymentHub.IP=149.139.24.87 
 
Should it look like this?-&gt; 
# Redundant IP's in the test/UA environment as of 2011-08-10 
#ClientChooser.IP 
149.139.24.12 
#PaymentHub.IP 
149.139.24.87
</div>

<div>
As well it is saying &quot;Set&quot; cannot be resolved to a type 
</div>

<div>
You don't need Set, that will make it complex. 
 
Just do as I said. 
 
And you properties file is more meaningful, it will help anyone in identifying which box ip is excluded.
</div>

<div>
This should make it more clear 
 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.util.Properties; 
 
 
public class TestProperties { 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public static void main(String[] args) throws Exception, IOException { 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Properties p = new Properties(); 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;p.load(new FileInputStream(new File(&quot;ip.properties&quot;))); 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(p.keySet().contains(&quot;190.1.1.1&quot;)); 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} 
}
</div>

<div>
Please note that I have just made what cmalakar@ said more clear!
</div>

<div>
Your initial format of property file with equal sign is not a bad idea - this is how property file should look like with name of property before the equal sign and value after the equal sign - just as you originally suggested. 
 
Set should work, but containsValuie()as suggested by cmalarkar is shorter. 
So just after you load properties you can use your original condition but instead of naming all individual IP's you just have one clause : 
 
...&amp;&amp; !p.containsValue() &amp;&amp;&nbsp;... 
 
And it would replace all your If's 

</div>

<div>
Sorry I meant of course 
 
... &amp;&amp;&nbsp;!p.containsValue(localIP) &amp;&amp;&nbsp;... 
 

</div>

<div>
But the most important stuff of this whole thread is: 
Never use == or != when comparing Strings in Java: 
even if you have twenty correct IF's they will still work - there is no limit on those - but comparing strings in such way will sooner or later lead you to very bad mistakes.
</div>

<div>
I think I got it working with reading the properties file but ran into another issue. The IP variable set by calliung in external function like this: &quot;String localIP = InetAddress.getLocalHost().getHostAddress();&quot; 
So its getting it's ip from an external function, I need to loop untill it gets one of the proper IP's. I've got some code but I still a little fuzzy around the placement of the logic... for example: 
 
new Properties().load(ListenerUtil.class.getResourceAsStream(&quot;redundantIPs.properties&quot;)); 
String localIP = InetAddress.getLocalHost().getHostAddress(); 
Properties p = new Properties(); 
p.load(new FileInputStream(&quot;redundantIPs.properties&quot;)); 
 
if (localIP != null &amp;&amp;&nbsp;!p.containsValue(localIP) &amp;&amp;(localIP.equals(WebUtil.getDevIPAddress()) || localIP.equals(WebUtil.getUaIPAddress()) || localIP.equals(WebUtil.getProdIPAddress()))) { 
code to start listener etc..... 
 
I want it to ignore the IP's in the properites file but not start the listners untill it gets one of the 3 ip's that are in the &quot;if&quot; statement. So I should probably do a loop before i hit, something along the lines of: 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
InetAddress &nbsp;in = InetAddress.getLocalHost(); 
InetAddress[] all = InetAddress.getAllByName(in.getHostName()); 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for(int i =0; i&lt;all.length; i++){ 
 
 
Does that makes sense? &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</div>

<div>
 1) The very first statement in your code starting with &quot;new Properties()...&quot; does not make sense, as you don't have a variable defined for these priperties. Further down the code you read properties in a reasonable way if your file is in the default folder of your process 

</div>

<div>
<div class="content wysiwyg-content">
I have an application that reads incoming packets from specific IP address. Testing is changing and adding IP's to the boxes and they are providing me with a list of IP's they want me to code into the app to ignore. 
 
The existing code look like this : 
if (localIP != null &amp;&amp;&nbsp;localIP != &quot;142.139.24.87&quot; &amp;&amp;&nbsp;localIP != &quot;142.139.24.12&quot; &amp;&amp;&nbsp;(localIP.equals(WebUtil.getDevIPAddress()) || localIP.equals(WebUtil.getUaIPAddress()) || localIP.equals(WebUtil.getProdIPAddress()))) 
 
As you can see I hard coded the first two IP's they provided to me to ignore. But now they are saying there could be up to 20 IP's which would make an huge if statement. I'm normally a 'net guy and this is java app so i'm a little out of my element. 
 
I know I could make a properties file that could contain all the ip's (they are stored as strings currently thankfully enough) and just basically in that if statement tell the app to ignore everything in that properties file. &nbsp; 
 
I have created the properties file which looks like: 
# Redundant IP's in the test/UA environment as of 2011-08-10 
ClientChooser.IP=149.139.24.12 &nbsp; 
PaymentHub.IP=149.139.24.87 
 
Now in the code how do call that and tell the app to ignore every IP in that file? 
 
Thanks 

</div>
</div>

I have an application that reads incoming packets from specific IP address. Testing is changing and adding IP's to the boxes and they are providing me with a list of IP's they want me to code into the app to ignore. 

The existing code look like this :
if (localIP != null && localIP != "142.139.24.87" && localIP != "142.139.24.12" && (localIP.equals(WebUtil.getDevIPAddress()) || localIP.equals(WebUtil.getUaIPAddress()) || localIP.equals(WebUtil.getProdIPAddress()))) 

As you can see I hard coded the first two IP's they provided to me to ignore. But now they are saying there could be up to 20 IP's which would make an huge if statement. I'm normally a 'net guy and this is java app so i'm a little out of my element. 

I know I could make a properties file that could contain all the ip's (they are stored as strings currently thankfully enough) and just basically in that if statement tell the app to ignore everything in that properties file.  

I have created the properties file which looks like:
# Redundant IP's in the test/UA environment as of 2011-08-10
ClientChooser.IP=149.139.24.12  
PaymentHub.IP=149.139.24.87

Now in the code how do call that and tell the app to ignore every IP in that file?

Thanks 


Ignoring IP's in a java properties file

Software is any set of instructions that directs a computer to perform specific tasks or operations. Computer software consists of programs, libraries and related non-executable data (such as documentation). Computer software is non-tangible, contrasted with computer hardware, which is the physical component of computers. Software written in a machine language is known as "machine code". However, in practice, software is usually written in high-level programming languages than machine language. High-level languages are translated into machine language using a compiler or interpreter or a combination of the two.

Software

JavaServer Pages (JSP) allow the development of dynamically generated web pages. It uses the Java programming language; JSP pages are translated into servlets at runtime, with each servlet being cached and reused until the JSP is modified. JSP allows Java code to be interleaved with static web markup content, so the resulting page can be compiled and executed on the server to deliver the content.