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<TITLE>Iterating the Characters of a String (Java Developers Almanac Example)
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  <h3>e307. Iterating the Characters of a String</h3>



<pre>    CharacterIterator it = new StringCharacterIterator(<font color="#0066ff"><i>"abcd"</i></font>);
    
    // Iterate over the characters in the forward direction
    for (char ch=it.first(); ch != CharacterIterator.DONE; ch=it.next()) {
        // Use ch ...
    }
    
    // Iterate over the characters in the backward direction
    for (char ch=it.last(); ch != CharacterIterator.DONE; ch=it.previous()) {
        // Use ch ...
    }
    
    // Other methods
    char ch = it.first();      // a
    ch = it.current();         // a
    ch = it.next();            // b
    ch = it.current();         // b
    ch = it.last();            // d
    int pos = it.getIndex();   // 3
    ch = it.next();            // DONE
    pos = it.getIndex();       // 4
    ch = it.previous();        // d
    ch = it.setIndex(<font color="#0066ff"><i>1</i></font>);       // b
    
    // Change the characters
    ((StringCharacterIterator)it).setText(<font color="#0066ff"><i>"efgh"</i></font>);
    ch = it.current();         // e
    
    // Create an iterator on a substring (efgh)
    int begin = <font color="#0066ff"><i>5</i></font>;
    int end = <font color="#0066ff"><i>9</i></font>;
    pos = <font color="#0066ff"><i>6</i></font>;
    it = new StringCharacterIterator(<font color="#0066ff"><i>"abcd efgh ijkl"</i></font>, begin, end, pos);
    ch = it.current();         // f
    ch = it.last();            // h
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            &nbsp;<b>Related Examples</b></font></td>
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e305. <a class="eglink" href="CheckChar.html?l=rel">
    Determining the Type of a Character
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e306. <a class="eglink" href="Coll.html?l=rel">
    Comparing Strings in a Locale-Independent Way
</a>
<br>

e308. <a class="eglink" href="AddAttr.html?l=rel">
    Adding an Attribute to a String
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<br>

e309. <a class="eglink" href="IncDouble.html?l=rel">
    Incrementing a Double by the Smallest Possible Amount
</a>
<br>

e310. <a class="eglink" href="LocMsg.html?l=rel">
    Localizing Messages
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