Java生成随机字符串和随即生成10以内的字符串

privatestaticintgetRandom(intcount) {

　　return(int) Math.round(Math.random() * (count));

　　}

privatestaticString string ="abcdefghijklmnopqrstuvwxyz";

privatestaticString getRandomString(intlength){

StringBuffer sb =newStringBuffer();

intlen = string.length();

for(inti =0; i < length; i++) {

sb.append(string.charAt(getRandom(len-1)));

}

returnsb.toString();

}

/**

*随即生成10以内的字符串 并排序 的核心代码

*/

public void testSort3(){ List<String> stringList = new ArrayList<String>();

String randomStr = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

//输入10以内随机数

Random random = new Random();

for(int i = 0; i < 10;i++){

StringBuilder builStr = new StringBuilder();

int sort = random.nextInt(10)+1;

//random生成的是类似[0,1),左包含又不包含的数，所以要+1

for(int j = 0;j < sort;j++){

char tempC = randomStr.charAt(random.nextInt(randomStr.length()));

builStr.insert(j, tempC);

}

String tempStr = builStr.toString();

stringList.add(tempStr);

}

System.out.println("-------排序前-------");

for(String string:stringList){

System.out.println("元素:"+string);

}

Collections.sort(stringList);

System.out.println("-------排序后-------");

for(String string:stringList){

System.out.println("元素:"+string);

}

}