<div>
Hi<br />
<br />
I am trying to do this:<br />
List &lt;SalesCycle&gt;= getSalesCycles();<br />
<br />
if (salesCyles.contains(sleCy<wbr />cles)){<br />
<br />
}<br />
<br />
In order to implement the above solution provide by you, I have to loop through the list of salesCycles and call the compareSleCycle &nbsp;method to find the exact match. In order to use the condition : salesCyles.contains(sleCyc<wbr />les) can we consider implementing equal method of the list ? <br />
<br />

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&gt;&gt;can we consider implementing equal method of the list ?<br />
<br />
Yes, that's the way to do it, although it's the equals method of the contained object that you need to implement. If you don't want to implement it like that for all time, you can use a wrapper object.
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1. &gt;&gt;&nbsp;although it's the equals method of the contained object that you need to implement. ? <br />
<br />
By contained object you mean sleCycle ? <br />
<br />
2. If i use the wrapper as provided by you in the solution I can not do :<br />
<br />
if (salesCyles.contains(sleCy<wbr />cles)){<br />
}<br />
<br />
I have to implement something like :<br />
<br />
for (salesCycles)<br />
{<br />
if (salesCycle.compareSleCycl<wbr />e (sleCycles))<br />
{<br />
}<br />
}<br />
<br />
In this case I have to loop through salesCycles looking for the equal condition where as in the following case : &nbsp;if (salesCyles.contains(sleCy<wbr />cles)) &nbsp;I can avoid that loop if we implement equals method ?<br />

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&gt;&gt;it's the equals method of the contained object that you need to implement<br />
<br />
That is to say, it is the objects in the List that will have their equals method called so the salesCycle class needs to implement equals. The methods takes an Object parameter and you'd have to cast it appropriately:<br />
<br />
public boolean equals(Object obj) {<br />
&nbsp; &nbsp; String id = null;<br />
&nbsp; &nbsp; if (obj instanceof salesCycle) {<br />
&nbsp; &nbsp; &nbsp; &nbsp; id = ((salesCycle)obj).getCycle<wbr />Id();<br />
&nbsp; &nbsp; } else if (obj instanceof sleCycle) {<br />
&nbsp; &nbsp; &nbsp; &nbsp; id = ((sleCycle)obj).getCycleId<wbr />();<br />
&nbsp; &nbsp; }<br />
&nbsp; &nbsp; return id != null and id.equals(this.cycleId);<br />
}<br />
<br />
That introduces some coupling that may or may not concern you. 
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Since it's the id you're interested in, then this field is probably the one you'd use in SalesCycle (class names should start upper case) to establish equality:<br />

<pre><code class="code-1 nolinks" id="code-265084"><span>public boolean equals(Object other) {</span>
<span>    return ((SalesCycle)other).id.equals(id);</span>
<span>}</span>
</code></pre>
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And CEHJ is right; it is Java convention to name classes using Pascal casing: the first letter of each word is capitalized. Variables, fields, and methods all use camel casing: the first letter of each word is capitalized except for the first word.
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That's true, but i thought we'd agreed that having heterogeneous types in a collection is already a bad thing and therefore 'wrong'. So applying equals should be OK
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<div>
Oh. I didn't have that understanding from the question. I though what the author had was, effectively:<br />
&nbsp; &nbsp; List&lt;SalesCycle&gt; cycles;<br />
&nbsp; &nbsp; SleCycle cycle;<br />
<br />
and the desired operation was:<br />
&nbsp; &nbsp; cycles.contains(cycle);<br />
<br />
I didn't think that SleCycle and SalesCycle objects were mixed in the same collection. I thought the problem was how to determine existence of an object in a homogeneous collection using a key object that was not of the same class.
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And did you just say two wrongs made a right?<br />
;-)
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<div class="content wysiwyg-content">
I have a list &nbsp;of salesCycle objects (salesCycle properties: cycleId, startDate, endDate). I have any other object sleCycle (sleCycle properties: cycleId, startDate,endDate), I want to check if the salesCycle.contains( sleCycle). salesCycle list contains the sleCycle if &nbsp;salsesCycle.cycleId = sleCycleId. Can you &nbsp;please guide me how can I check salesCycle list contains sleCycle based on comparing cycleId ? cycleId in both the objects is of type:String.
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I have a list  of salesCycle objects (salesCycle properties: cycleId, startDate, endDate). I have any other object sleCycle (sleCycle properties: cycleId, startDate,endDate), I want to check if the salesCycle.contains( sleCycle). salesCycle list contains the sleCycle if  salsesCycle.cycleId = sleCycleId. Can you  please guide me how can I check salesCycle list contains sleCycle based on comparing cycleId ? cycleId in both the objects is of type:String.

List.contains() method Java 1.5

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.