java问题——Constructor call must be the first statement in a constructor

刚刚按照书上编了个小程序，写着写着就提示一个错误：Constructor
call must be the first statement in a constructor。然后在网上搜了一下，原来是构造函数都要放在第一行，这是语法规则。那好吧，暂且这样考虑吧。（然后想说一句，java高手真经错误挺多的啊）

class Car{
int v;
String name;

Car(int v, String name){
this.v = v;
this.name = name;
}

Car(){

}

void drive(){
System.out.println("Car 速度：" + v);
}
}

class Bus extends Car{
int p;

Bus(){

}

Bus(int p){
this.p = p;
}

Bus(int p, int v, String name){
super(v, name);
this.p = p;	//现在这里改回来了
}

void carry(){
System.out.println("Bus 载人：" + p);
}

void print(){
System.out.println("Bus 速度：" + v);
System.out.println("Bus 载人：" + p);
System.out.println("Bus 名字：" + name);
}
}