Java常用類:偽隨機數產生類__Java

來源:互聯網
上載者:User
一: Random類(java.util.Random) 構造器:

    樣本:

/** * 功能描述:隨機擷取6位純數字 *  * @param */public static String getRandom() {int code = 0;while (code < 100000) {code = new Random().nextInt(999999);}return String.valueOf(code);}

public static String generateCode() {Random random =  new Random();long i = random.nextInt();DecimalFormat df = new DecimalFormat("00000000");String id = df.format(i);return id;}


java.text.DecimalFormat:


二: UUID類(java.util.UUID) 構造器:


樣本:

/* 產生32位的UUID */public static String generateId() {UUID uuid = UUID.randomUUID();String id = uuid.toString();id = id.replaceAll("-", "");return id;}

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