package?xuanke;
import?java.util.ArrayList;
import?java.util.List;
import?java.util.Random;
public?class?RandString?{?
??List<String>?randStr?=?new?ArrayList<>();
??
?public?void?getRandStr(){
??String?n?=?"abcdefghigklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";??
??Random?random?=?new?Random();????
??for(int?i?=0;i<10;i++){?
???int?j?=0;
???StringBuffer?sb?=?new?StringBuffer();???
??for(int?k?=?random.nextInt(10);j<k;){
????//?就是這里↓?明明處理了隨機到0的情況，但是還是會出現(xiàn)空字符串
????if(k==0){
?????continue;
????}else{
?????int?a?=?random.nextInt(n.length()-1);???
?????sb.append(n.charAt(a));?
?????j++;
????}
?????
????
???}
??randStr.add(sb.toString());???
??}??
?}
?
?public?void?forEcheGetRandStr(){
??for?(String?string?:?randStr)?{
???System.out.println(string);
??}
?}
??
?public?static?void?main(String[]?args)?{
??//?TODO?自動生成的方法存根
??RandString?rs?=?new?RandString();
??rs.getRandStr();
??rs.forEcheGetRandStr();
?}
}