StringUtil.java Source code

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Here is the source code for StringUtil.java

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/* $Id: StringUtil.java 43 2008-06-24 13:22:56Z takao.nakaguchi $
 * 
 * Copyright 2008 Takao Nakaguchi.
 * 
 * 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 jp.whitedog.util;

import java.util.Random;

/**
 * Utilities related to String.
 * @author Takao Nakaguchi
 */
public class StringUtil {
    /**
     * generate string consists of random characters.
     * @param length length of generated string
     * @return string
     */
    public static String randomString(int length) {
        StringBuilder b = new StringBuilder();
        for (int i = 0; i < length; i++) {
            b.append(base.charAt(random.nextInt(base.length())));
        }
        return b.toString();
    }

    private static String base = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabsdefghijklmnopqrstuvwxyz";
    private static Random random = new Random();
}