/*
* Copyright (C) 2006 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.elasticsearch.common.inject.internal;
/**
* String utilities.
*
* @author crazybob@google.com (Bob Lee)
*/
public class Strings {
private Strings() {
}
/**
* Returns a string that is equivalent to the specified string with its
* first character converted to uppercase as by {@link String#toUpperCase}.
* The returned string will have the same value as the specified string if
* its first character is non-alphabetic, if its first character is already
* uppercase, or if the specified string is of length 0.
* <p>
* For example:
* <pre>
* capitalize("foo bar").equals("Foo bar");
* capitalize("2b or not 2b").equals("2b or not 2b")
* capitalize("Foo bar").equals("Foo bar");
* capitalize("").equals("");
* </pre>
*
* @param s the string whose first character is to be uppercased
* @return a string equivalent to <tt>s</tt> with its first character
* converted to uppercase
* @throws NullPointerException if <tt>s</tt> is null
*/
public static String capitalize(String s) {
if (s.length() == 0) {
return s;
}
char first = s.charAt(0);
char capitalized = Character.toUpperCase(first);
return (first == capitalized)
? s
: capitalized + s.substring(1);
}
}