多做题,通过考试没问题!

Java认证考试

睦霖题库>其他计算机考试>Java认证考试

public class Car {  private int wheelCount;  private String vin;  public Car(String vin) {  this.vin = vin;  this.wheelCount = 4;  }  public String drive() {  return “zoom-zoom”;  }  public String getInfo() {  return “VIN: “+ vin + “wheels: “+ wheelCount;  }  }  And:  public class MeGo extends Car {  public MeGo(String vin) {  this.wheelCount = 3;  }  }  What two must the programmer do to correct the compilation errors?()

  • A、 insert a call to this() in the Car constructor
  • B、 insert a call to this() in the MeGo constructor
  • C、 insert a call to super() in the MeGo constructor
  • D、 insert a call to super(vin) in the MeGo constructor
  • E、 change the wheelCount variable in Car to protected
  • F、 change line 3 in the MeGo class to super.wheelCount = 3;
正确答案:D,E
答案解析:
进入题库查看解析

微信扫一扫手机做题