假設(shè)一個車牌號碼由三個字母和四個數(shù)字組成？

public class Hello {

public static void main(String[] args) {

char c1 =(char)(int)(Math.random()*26+65);

char c2 =(char)(int)(Math.random()*26+65);

char c3 =(char)(int)(Math.random()*26+65);

int x1=(int)(Math.random()*10);

int x2=(int)(Math.random()*10);

int x3=(int)(Math.random()*10);

int x4=(int)(Math.random()*10);

System.out.print(c1);

System.out.print(c2);

System.out.print(c3);

System.out.print(x1);

System.out.print(x2);

System.out.print(x3);

System.out.print(x4);

}

}