Util.java Source code

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Here is the source code for Util.java

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import java.util.ArrayList;
import java.util.Collection;

/* Copyright (c) 2008 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 com.google.gdata.util.common.base;

/**
 * Some common string manipulation utilities.
 */
public class Util {

    /**
    * 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);
    }

}