面向对象编程练习之一

class EXP3_1 {
  private String ownerName; //车主姓名
  private float curSpeed; //当前车速
  private float curDirInDegree; //当前方向盘转向角度
  public EXP3_1(String ownerName){
    this.ownerName=ownerName;
  }
  public EXP3_1(String ownerName, float speed, float dirInDegree){
   this(ownerName);
   this.curSpeed=speed;
   this.curDirInDegree=dirInDegree;
}
  public String getOwnerName() { //提供对车主姓名的访问
    return ownerName;
  }
  public float getCurDirInDegree() { //提供对当前方向盘转向角度的访问
    return curDirInDegree;
  }
  public float getCurSpeed() { //提供对当前车速的访问
    return curSpeed;
  }
  public void changeSpeed(float curSpeed) { //提供改变当前的车速
    this.curSpeed = curSpeed;
  }
  public void stop(){ //提供停车
    this.curSpeed=0;
  }
}

public class EXP3_2 {
  public static void main(String[] args){
    EXP3_1 car=new EXP3_1("成龙",200f,25f);
    System.out.println("车主姓名: "+car.getOwnerName());
    System.out.println("当前车速: "+car.getCurSpeed());
    System.out.println("当前转向角度: "+car.getCurDirInDegree());
    car.changeSpeed(80);
    System.out.println("在调用changeSpeed(80)后,车速变为: " + car.getCurSpeed());
    car.stop();
    System.out.println("在调用stop()后, 车速变为: "+car.getCurSpeed());
  }
}
运行结果：
--------------------Configuration: <Default>--------------------
车主姓名: 成龙
当前车速: 200.0
当前转向角度: 25.0
在调用changeSpeed(80)后,车速变为: 80.0
在调用stop()后, 车速变为: 0.0

Process completed.