Java生成随机数代码示范

Java生成随机数代码演示

import java.util.Random;
public class RandomCode {
	public String getrandomCode(){
		Random random = new Random();
		StringBuffer randomCode = new StringBuffer();
		int countCode = 4;
		char[] codeSequence = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
		'9' };
		for(int i=0;i<countCode;i++){
			String strRand = String.valueOf(
					codeSequence[random.nextInt(codeSequence.length)]);
			randomCode.append(strRand);
		}
		return randomCode.toString();
	}
	
	public static void main(String[] args) {
		RandomCode rd = new RandomCode();
		String str = rd.getrandomCode();
		System.out.println(str);
		
	}
}