AutoMobile am = new AutoMobile(3

public class AutoMobile {
public AutoMobile(int oilVolume, int leftOilVolume) {
int addOilVolume = oilVolume - leftOilVolume;
int time = 0;
System.out.println("即将加满油箱……");
while (addOilVolume != 0) {
System.out.println("还剩余" + addOilVolume + "L，已耗时" + time + "秒。");
addOilVolume -= 2;
time += 5;
}
System.out.println("还剩余" + addOilVolume + "L，已耗时" + time + "秒。");
}

public static void main(String[] args) {
    AutoMobile am = new AutoMobile(30, 6);
}

}