Java generates random numbers and random letters, using the madom class. Examples are as follows:

Parcel? com . Qiu . Lin . he；

Public? Class? Shi Ce? {

Public? Static electricity Invalid? main(String[]？ args)？ {

int？ str 1？ =? 0;

For what? (int？ Me? =? 0; ? Me? & lt？ 25; ? i++)？ {//? If you want to generate several characters, change 4 to several. If it is changed to 1, a random letter will be generated.

str 1？ =? (char)？ (Math.random()？ *? 26);

}

System.out.println ("output randomly generated strings"? +? str 1)；

String? str？ =? "";

For what? (int？ Me? =? 0; ? Me? & lt？ 25; ? i++)？ {//? If you want to generate several characters, change 4 to several. If it is changed to 1, a random letter will be generated.

str？ =? str？ +? (char)？ (Math.random()？ *? 26? +? a’)；

}

System.out.println ("output randomly generated strings"? +? str)；

}

} The running results are as follows: