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    <p>If you <strong>do not</strong> want to <strong>lose</strong> the <code>originalList</code> then probably this code can help</p> <pre><code>List&lt;String&gt; orgList = new ArrayList&lt;String&gt;(); orgList.add("a"); orgList.add("b"); List&lt;String&gt; newList = new ArrayList&lt;String&gt;(); newList.add("a"); newList.add("d"); newList.add("e"); newList.add("f"); List&lt;String&gt; result = new ArrayList&lt;String&gt;(); List&lt;String&gt; existingInBoth = new ArrayList&lt;String&gt;(); //Add item to result, if its present in newList BUT not in orgList for(String s : newList) { if(!orgList.contains(s)) result.add(s); } //Add the common items (this is inverse of removing the item which is there in orgList and not in newList) for(String s : orgList) { if(newList.contains(s)) existingInBoth.add(s); } result.addAll(existingInBoth); System.out.println(result); </code></pre> <p>For this to work in your case, you need to make <code>MyClass</code> override <code>equals()</code> method of <code>java.lang.Object</code> class and define the <strong>equality</strong> of the objects. Reason being, the <code>contains(Object)</code> method essentially checks the <strong>existance</strong> of an object within the collection, by checking the <strong>equality</strong>(<code>ob1.equals(obj2)</code>) of the object, with all the elements in the collection.</p> <p>The logic within the <code>equals()</code> method should be similar to the one which is written in <code>hasMyClass</code> method's <code>if</code> condition</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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