Java Random Int randomSMSCode(int length)

Description

random SMS Code

License

Open Source License

Declaration

public static final String randomSMSCode(int length) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {

    public static final String randomSMSCode(int length) {
        boolean numberFlag = true;
        String retStr = "";
        String strTable = numberFlag ? "1234567890" : "1234567890abcdefghijkmnpqrstuvwxyz";
        int len = strTable.length();
        boolean bDone = true;
        do {// w  w  w . java  2s . c o  m
            retStr = "";
            int count = 0;
            for (int i = 0; i < length; i++) {
                double dblR = Math.random() * len;
                int intR = (int) Math.floor(dblR);
                char c = strTable.charAt(intR);
                if (('0' <= c) && (c <= '9')) {
                    count++;
                }
                retStr += strTable.charAt(intR);
            }
            if (count >= 2) {
                bDone = false;
            }
        } while (bDone);
        return retStr;
    }
}

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9. randomString(int length)