直接上代码
public static int getRandNum() {
int randNum = 100000 + (int)(Math.random() * ((999999 - 100000) + 1));
return randNum;
}
测试代码,如果不是6位数的就打印error
public static void main(String[] args) {
for (int i = 0; i < 100000; i++) {
int n = getRandNum();
if(n > 999999 || n < 100000){
System.out.println("error");
}
}
}