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);
	}
}