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<div class="subTitle">com.jgoodies.common.base</div>
<h2 title="Class Strings" class="title">Class Strings</h2>
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<pre>public class <span class="strong">Strings</span>
extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">Provides frequently used static null-safe String testing methods .</div>
<dl><dt><span class="strong">Author:</span></dt>
<dd>Karsten Lentzsch</dd></dl>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#ELLIPSIS_STRING">ELLIPSIS_STRING</a></strong></code>
<div class="block">The correct ellipsis string.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#NO_ELLIPSIS_STRING">NO_ELLIPSIS_STRING</a></strong></code>
<div class="block">A string with three dots that should is often meant
to be the ellipsis string "?" or character '?'.</div>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#Strings()">Strings</a></strong>()</code> </td>
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#abbreviateCenter(java.lang.String,%20int)">abbreviateCenter</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str,
int maxLength)</code>
<div class="block">Abbreviates the given string if it exceeds the given maximum length
by replacing its center part with an ellipsis ('…').</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#get(java.lang.String,%20java.lang.Object...)">get</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str,
<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>... args)</code>
<div class="block">If no arguments are provided, the plain String is returned.</div>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#isBlank(java.lang.String)">isBlank</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</code>
<div class="block">Checks if the given string is whitespace, empty ("") or <code>null</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#isEmpty(java.lang.String)">isEmpty</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</code>
<div class="block">Checks if the given string is empty ("") or <code>null</code>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#isNotBlank(java.lang.String)">isNotBlank</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</code>
<div class="block">Checks if the given string is not empty (""),
not <code>null</code> and not whitespace only.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#isNotEmpty(java.lang.String)">isNotEmpty</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</code>
<div class="block">Checks if the given string is not empty ("")
and not <code>null</code>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#isTrimmed(java.lang.String)">isTrimmed</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</code>
<div class="block">Checks if the given string is <code>null</code>, empty (""),
or the first and last characters are not whitespace.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../com/jgoodies/common/base/Strings.html#startsWithIgnoreCase(java.lang.String,%20java.lang.String)">startsWithIgnoreCase</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str,
<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> prefix)</code>
<div class="block">Checks if <code>str</code> starts with the given prefix ignoring cases.</div>
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<h4>NO_ELLIPSIS_STRING</h4>
<pre>public static final <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> NO_ELLIPSIS_STRING</pre>
<div class="block">A string with three dots that should is often meant
to be the ellipsis string "?" or character '?'.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.7</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/jgoodies/common/base/Strings.html#ELLIPSIS_STRING"><code>ELLIPSIS_STRING</code></a>,
<a href="../../../../constant-values.html#com.jgoodies.common.base.Strings.NO_ELLIPSIS_STRING">Constant Field Values</a></dd></dl>
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<h4>ELLIPSIS_STRING</h4>
<pre>public static final <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> ELLIPSIS_STRING</pre>
<div class="block">The correct ellipsis string.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/jgoodies/common/base/Strings.html#NO_ELLIPSIS_STRING"><code>NO_ELLIPSIS_STRING</code></a>,
<a href="../../../../constant-values.html#com.jgoodies.common.base.Strings.ELLIPSIS_STRING">Constant Field Values</a></dd></dl>
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<h4>Strings</h4>
<pre>protected Strings()</pre>
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<pre>public static boolean isBlank(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</pre>
<div class="block">Checks if the given string is whitespace, empty ("") or <code>null</code>.
<pre>
Strings.isBlank(null) == true
Strings.isBlank("") == true
Strings.isBlank(" ") == true
Strings.isBlank(" abc") == false
Strings.isBlank("abc ") == false
Strings.isBlank(" abc ") == false
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the string to check, may be <code>null</code></dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the string is whitespace, empty
or <code>null</code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/jgoodies/common/base/Strings.html#isEmpty(java.lang.String)"><code>isEmpty(String)</code></a></dd></dl>
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<pre>public static boolean isNotBlank(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</pre>
<div class="block">Checks if the given string is not empty (""),
not <code>null</code> and not whitespace only.
<pre>
Strings.isNotBlank(null) == false
Strings.isNotBlank("") == false
Strings.isNotBlank(" ") == false
Strings.isNotBlank(" abc") == true
Strings.isNotBlank("abc ") == true
Strings.isNotBlank(" abc ") == true
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the string to check, may be <code>null</code></dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the string is not empty
and not <code>null</code> and not whitespace only</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/jgoodies/common/base/Strings.html#isEmpty(java.lang.String)"><code>isEmpty(String)</code></a></dd></dl>
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<pre>public static boolean isEmpty(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</pre>
<div class="block">Checks if the given string is empty ("") or <code>null</code>.
<pre>
Strings.isEmpty(null) == true
Strings.isEmpty("") == true
Strings.isEmpty(" ") == false
Strings.isEmpty("Hi ") == false
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the string to check, may be <code>null</code></dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the string is empty or <code>null</code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/jgoodies/common/base/Strings.html#isBlank(java.lang.String)"><code>isBlank(String)</code></a></dd></dl>
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<h4>isNotEmpty</h4>
<pre>public static boolean isNotEmpty(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</pre>
<div class="block">Checks if the given string is not empty ("")
and not <code>null</code>.
<pre>
Strings.isNotEmpty(null) == false
Strings.isNotEmpty("") == false
Strings.isNotEmpty(" ") == true
Strings.isNotEmpty("Hi") == true
Strings.isNotEmpty("Hi ") == true
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the string to check, may be <code>null</code></dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the string is not empty and not <code>null</code></dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../com/jgoodies/common/base/Strings.html#isBlank(java.lang.String)"><code>isBlank(String)</code></a></dd></dl>
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<h4>isTrimmed</h4>
<pre>public static boolean isTrimmed(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str)</pre>
<div class="block">Checks if the given string is <code>null</code>, empty (""),
or the first and last characters are not whitespace.
<pre>
Strings.isTrimmed(null) == true
Strings.isTrimmed("") == true
Strings.isTrimmed(" ") == false
Strings.isTrimmed("Hi") == true
Strings.isTrimmed("Hi ") == false
Strings.isTrimmed(" Hi") == false
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the string to check, may be <code>null</code></dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code> if the string is <code>null</code>, empty,
or the first and last characters are not whitespace.</dd><dt><span class="strong">Since:</span></dt>
<dd>1.3</dd></dl>
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<h4>startsWithIgnoreCase</h4>
<pre>public static boolean startsWithIgnoreCase(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str,
<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> prefix)</pre>
<div class="block">Checks if <code>str</code> starts with the given prefix ignoring cases.
<code>null</code> is handled safely; if both arguments are null, true
is returned, false otherwise.
<pre>
Strings.startsWithIgnoreCase(null, null) == true
Strings.startsWithIgnoreCase("a", null) == false
Strings.startsWithIgnoreCase(null, "a") == false
Strings.startsWithIgnoreCase("", "") == true
Strings.startsWithIgnoreCase(" ", "") == true
Strings.startsWithIgnoreCase("John", "J") == true
Strings.startsWithIgnoreCase("John", "Jo") == true
Strings.startsWithIgnoreCase("John", "Joh") == true
Strings.startsWithIgnoreCase("John", "joh") == true
Strings.startsWithIgnoreCase("john", "Joh") == true
Strings.startsWithIgnoreCase("john", "joh") == true
Strings.startsWithIgnoreCase("John", "John") == true
Strings.startsWithIgnoreCase("John", "john") == true
Strings.startsWithIgnoreCase("John", "Jonny") == false
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the test string to check, may be null</dd><dd><code>prefix</code> - the prefix to check for, may be null</dd>
<dt><span class="strong">Returns:</span></dt><dd><code>true</code>, if the string starts with the prefix, ignoring cases,
<code>false</code> otherwise</dd><dt><span class="strong">See Also:</span></dt><dd><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true#startsWith(java.lang.String)" title="class or interface in java.lang"><code>String.startsWith(java.lang.String)</code></a></dd></dl>
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<a name="abbreviateCenter(java.lang.String, int)">
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<h4>abbreviateCenter</h4>
<pre>public static <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> abbreviateCenter(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str,
int maxLength)</pre>
<div class="block">Abbreviates the given string if it exceeds the given maximum length
by replacing its center part with an ellipsis ('…').
If the string is <code>null</code> or shorter than the limit,
it is returned as is.<p>
<pre>
Strings.abbreviateCenter(null, 3) == null
Strings.abbreviateCenter("", 3) == ""
Strings.abbreviateCenter(" ", 3) == " "
Strings.abbreviateCenter("a", 3) == "a"
Strings.abbreviateCenter("ab", 3) == "ab"
Strings.abbreviateCenter("abc", 3) == "abc"
Strings.abbreviateCenter("abcd", 3) == "a…d"
Strings.abbreviateCenter("abcde", 3) == "a…e"
Strings.abbreviateCenter("abcde", 4) == "ab…e"
Strings.abbreviateCenter("abcdef", 4) == "ab…f"
Strings.abbreviateCenter("abcdefg", 5) == "ab…fg"
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>str</code> - the source string</dd><dd><code>maxLength</code> - the maximum length of the result string</dd>
<dt><span class="strong">Returns:</span></dt><dd><code>str</code> if its length is less than or equal to <code>maxLength</code>,
an abbreviated string with length <code>maxLength</code> where
the center is replaced by an ellipsis</dd></dl>
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<a name="get(java.lang.String, java.lang.Object...)">
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<h4>get</h4>
<pre>public static <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> get(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> str,
<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>... args)</pre>
<div class="block">If no arguments are provided, the plain String is returned.
Otherwise the string will be formatted using <code>String.format</code>
with the given arguments.<p>
<pre>
Strings.get(null) == null
Strings.get("") == ""
Strings.get(" ") == " "
Strings.get("hello") == "hello"
Strings.get("a %s c", "b") == "a b c"
Strings.get("%1$s %2$s %3$s", "a", "b", "c") == "a b c"
</pre></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>args</code> - optional format arguments forwarded to <code>String#format</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the String formatted with the optional arguments - if any</dd><dt><span class="strong">Since:</span></dt>
<dd>1.8</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true#format(java.lang.String,%20java.lang.Object...)" title="class or interface in java.lang"><code>String.format(String, Object...)</code></a></dd></dl>
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