Java Random String randomString(final int length)

Description

random String

License

Apache License

Declaration

public static String randomString(final int length) 

Method Source Code

//package com.java2s;
/*//w  ww.j  a  v  a2s.  co  m
 * Copyright 2002-2012 the original author or authors.
 *
 * 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.
 */

import java.util.*;

public class Main {
    public static String randomString(final int length) {
        Random random = new Random();
        final char[] chars = new char[length];
        for (int i = 0, x = chars.length; i < x;) {
            do {
                final int cp = random.nextInt(0x10FFFF + 1);
                if (!Character.isDefined(cp)) {
                    continue;
                }
                final char[] chs = Character.toChars(cp);
                if (chs.length > x - i) {
                    continue;
                }
                for (final char ch : chs) {
                    chars[i++] = ch;
                }
                break;
            } while (true);
        }
        return new String(chars);
    }
}

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