coll_sortset.html

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<TITLE>Creating a Sorted Set
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  <h3>
    e358.  
    Creating a Sorted Set</h3>

A sorted set is a set that maintains its elements in a sorted
order. Inserts and retrievals are more expensive in a sorted set but
iterations over the set is always in order.

<P> See also <a href="../java.util/coll_Sets.html" class="eglink"><font size="-1"><b>e352</b> Creating a Set</font></a>.


<pre>
    // Create the sorted set
    SortedSet set = new TreeSet();
    
    // Add elements to the set
    set.add(<font color="#0066ff"><i>"b"</i></font>);
    set.add(<font color="#0066ff"><i>"c"</i></font>);
    set.add(<font color="#0066ff"><i>"a"</i></font>);
    
    // Iterating over the elements in the set
    Iterator it = set.iterator();
    while (it.hasNext()) {
        // Get element
        Object element = it.next();
    }
    // The elements are iterated in order: a, b, c
    
    // Create an array containing the elements in a set (in this case a String array).
    // The elements in the array are in order.
    <font color="#0066ff"><i>String</i></font>[] array = (<font color="#0066ff"><i>String</i></font>[])set.toArray(new <font color="#0066ff"><i>String</i></font>[set.size()]);
</pre>
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            &nbsp;Related Examples
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e359. <a class="eglink" href="coll_SortArray.html?l=rel">
    Sorting an Array
</a>
<br>

e360. <a class="eglink" href="coll_FindObjectInArray.html?l=rel">
    Finding an Element in a Sorted Array
</a>
<br>

e361. <a class="eglink" href="coll_FindInList.html?l=rel">
    Finding an Element in a Sorted List
</a>
<br>

e362. <a class="eglink" href="coll_InsertInList.html?l=rel">
    Inserting an Element into a Sorted List
</a>
<br>


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        See also: 
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Arrays">
    Arrays
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Bits">
    Bits
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Collections">
    Collections
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Dates">
    Dates
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Hash%20Tables">
    Hash Tables
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Lists">
    Lists
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Property%20Files">
    Property Files
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Sets">
    Sets
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Time">
    Time
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Timers">
    Timers
</a>&nbsp;&nbsp;

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