public class NonMotor {

/*此类为父类-非机动车类

* 属性为：品牌、颜色、轮子（默认两个）、座椅（默认一个）

*/

private String brand;//品牌

private String color;//颜色

private int wheel=2;//轮子，默认两个

private int seat=1;//座椅，默认一个

//添加无参构造

public NonMotor() {

}

//添加双参构造，对品牌和颜色进行赋值

public NonMotor(String brand,String color) {

   this.setBrand(brand);

   this.setColor(color);

}

//添加全参构造，对所有属性进行赋值

public NonMotor(String brand,String color,int wheel,int seat) {

this.setBrand(brand);

this.setColor(color);

this.setSeat(seat);

this.setWheel(wheel);

}

public String getBrand() {

return brand;

}

public void setBrand(String brand) {

this.brand = brand;

}

public String getColor() {

return color;

}

public void setColor(String color) {

this.color = color;

}

public int getWheel() {

return wheel;

}

public void setWheel(int wheel) {

this.wheel = wheel;

}

public int getSeat() {

return seat;

}

public void setSeat(int seat) {

this.seat = seat;

}

public String work() {

String str = "这是一辆"+this.color+"颜色的，"+this.brand+"的非机动车，有"+this.wheel+"个轮子，有"+this.seat+"个座位的非机动车";

return str;

}

相关代码：

public class Bicycle extends NonMotor{
	//添加构造方法,通过super调用父类的双参构造，完成颜色和品牌的属性赋值
	public Bicycle() {
		super("捷安特牌","黄颜色");
	}

	//重写父类work方法
	public String work(){
		String str="这是一辆"+this.getColor()+"的，"+this.getBrand()+"的自行车。";
				return str;
	}

相关代码：

public class ElectricVehicle extends NonMotor{
	//增加了电池品牌的属性
	private String battery;

	//添加无参构造
	public ElectricVehicle() {

	}
	//添加全参构造方法
	public ElectricVehicle(String battery) {
		this.battery=battery;
	}

	//get\set方法添加
	public String getBattery() {
		return battery;
	}
	public void setBattery(String battery) {
		this.battery = battery;
	}

	//重写方法
	public String work() {
		String str="这是一辆使用"+this.battery+"电池的电动车";
		return str;
	}

相关代码：

	public class Tricycle extends NonMotor{
​	//添加无参构造
	public Tricycle() {
		super.setWheel(3);
	}
   //重写方法
	public String work() {
		String str="三轮车是一款有"+this.getWheel()+"个轮子的非机动车";
		return str;
	}

相关代码：

​public class test {

	public static void main(String[] args) {
		System.out.print("父类信息测试：");
		NonMotor non=new NonMotor("红颜色","天宇牌",4,2);
		System.out.println(non.work());

		System.out.print("自行车类信息测试：");
		Bicycle bicycle=new Bicycle();
		System.out.println(bicycle.work());

		System.out.print("电动车类信息测试：");
		ElectricVehicle el=new ElectricVehicle("飞鸽牌");
		System.out.println(el.work());

		System.out.print("三轮车类信息测试：");
		Tricycle tr=new Tricycle();
		System.out.println(tr.work());


	}