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<TITLE>Determining the Type of a Character
(Java Developers Almanac Example)
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<h3>
e305.
Determining the Type of a Character</h3>
You should use the methods in the class <code>Character</code> to determine
the properties of a character. These methods work for the entire
Unicode character set.
<pre>
char ch = <font color="#0066ff"><i>'a'</i></font>;
if (Character.isLetter(ch)) { // true
}
if (Character.isDigit(ch)) { // false
}
if (Character.isLowerCase(ch)) { // true
}
if (Character.isUpperCase(ch)) { // false
}
// See Character for more methods.
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Related Examples
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e306. <a class="eglink" href="Coll.html?l=rel">
Comparing Strings in a Locale-Independent Way
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e307. <a class="eglink" href="StrIter.html?l=rel">
Iterating the Characters of a String
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e308. <a class="eglink" href="AddAttr.html?l=rel">
Adding an Attribute to a String
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e309. <a class="eglink" href="IncDouble.html?l=rel">
Incrementing a Double by the Smallest Possible Amount
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e310. <a class="eglink" href="LocMsg.html?l=rel">
Localizing Messages
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See also:
<a class="eglink" href="/egs/java.text/pkg.html?l=rel#Dates">
Dates
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<a class="eglink" href="/egs/java.text/pkg.html?l=rel#Messsages">
Messsages
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<a class="eglink" href="/egs/java.text/pkg.html?l=rel#Numbers">
Numbers
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<a class="eglink" href="/egs/java.text/pkg.html?l=rel#Times">
Times
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<a class="eglink" href="/egs/java.text/pkg.html?l=rel#Words%20and%20Sentences">
Words and Sentences
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