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  1. PO
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    <pre><code>public class TestDuplicate { /** * @param args */ static List&lt;String&gt; list = new ArrayList&lt;String&gt;(0); private static String[] skipElements; public static void main(String[] args) { list.add("Test"); list.add("xyz"); list.add("xyz"); list.add("pqrs"); list.add("pqrs"); list.add("abcd"); skipElements = new String[list.size()]; for(int i = 0; i &lt; list.size() ; i++){ if(isDuplicate(list.get(i), i)){ skipElements[i] = list.get(i); } } removeAllDuplicate(); System.out.println("Non Duplicates are--&gt;"+ list); } private static boolean isDuplicate(String element, int index){ for(int i = index+1; i &lt; list.size(); i++){ if(checkExistance(element) ){ return Boolean.TRUE; }else{ if(element.equalsIgnoreCase(list.get(i))){ return Boolean.TRUE; } } } return false; } private static boolean checkExistance(String element){ for(int i = 0 ; i &lt; skipElements.length ; i++){ if(element.equalsIgnoreCase(skipElements[i])){ return Boolean.TRUE; } } return Boolean.FALSE; } private static void removeAllDuplicate(){ for(int i = 0; i &lt; skipElements.length; i++){ if(skipElements[i] != null){ removeFromList(skipElements[i]); } } } private static void removeFromList(String element){ if(list.contains(element)){ list.remove(element); removeFromList(element); } } } </code></pre> <p>Which will give you 0 or more non duplicate from the list of strings.</p> <p>Other Approach with Singel Variable:</p> <h1>2:</h1> <pre><code>public class TestDuplicateWithOneVariable { /** * @param args */ static List&lt;String&gt; list = new ArrayList&lt;String&gt;(0); private static int stop = 0; public static void main(String[] args) { list.add("xyz"); list.add("xyz"); list.add("xyz"); list.add("pqrs"); list.add("pqrs"); list.add("abcd"); list.add("Test"); while(stop &gt;= 0){ if(list.size() &gt; 0 &amp;&amp; list.size() &gt; stop){ if(isDuplicate(list.get(stop))){ removeFromList(list.get(stop)); } }else{ stop = -1; } } System.out.println("Non Duplicate--&gt;"+list); } private static void removeFromList(String element){ if(list.contains(element)){ stop = 0; list.remove(element); removeFromList(element); } } private static boolean isDuplicate(String element){ list.remove(element); if(list.contains(element)){ return Boolean.TRUE; }else{ list.add(stop,element); stop++; return Boolean.FALSE; } } } </code></pre>
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    1. POfind element that is not duplicated in Array List using only 1 temp variable
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    1. PTAnswer
    1. USJayaram
    1. USJayaram
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    1. This table or related slice is empty.
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    1. COI imagine all 3 your `i` variables classify as variables, and, since `main` calls `isDuplicate` calls `checkExistance`, your code uses 3 variables.
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      1. USDukeling
    2. CO@Dukeling: agreed...posted 2nd approach...
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      1. USJayaram
 

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