java笔记学习三

学习代码记录

/**

* 随机生成指定长度的字符串

*

* @param

* @param lengthOfString

* @return 纯字母字符串

*/

public static String getRndStrByLen(int lengthOfString) {

int i, count = 0;

final String chars = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";

String[] charArr = chars.split(",");

StringBuffer randomStr = new StringBuffer("");

Random rnd = new Random();

int strLen = charArr.length;

while (count < lengthOfString) {

i = rnd.nextInt(strLen);// strLen如果等于26，i值就在0-25之间

randomStr.append(charArr[i]);

count++;

}

return randomStr.toString().toLowerCase();

}

@Test

private void InitDriver() {

String a = Randomo.getRndStrByLen(2);  //没有清楚需要用get方式获取数据，还的继续学习

System.out.println(a);

}