Java Random String getRandomString(int size)

Description

Generates a random String of length size using the default encoding scheme.

License

Apache License

Parameter

Parameter	Description
size	of the string (character count)

Return

the generated

Declaration

static public String getRandomString(int size) 

Method Source Code

//package com.java2s;
/*//from  w w  w .  jav a2s  . c om
 *   Copyright 2009 Joubin Houshyar
 * 
 *   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.Random;

public class Main {
    /** 
     * Random generator used for Util random functions, 
     * instantiated using {@link System#currentTimeMillis()} as seed
     */
    final static Random random = new Random(System.currentTimeMillis());

    /**
     * Generates a random {@link String} of length <code>size</code> using the default
     * encoding scheme.  String content is ASCII characters.
     * @param size of the string (character count)
     * @return the generated {@link String}
     */
    static public String getRandomString(int size) {
        StringBuilder builder = new StringBuilder(size);
        for (int i = 0; i < size; i++) {
            char c = (char) (random.nextInt(126 - 33) + 33);
            builder.append(c);
        }
        return builder.toString();
    }
}

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9. getRandomString(int strLength)