Java/com/study/demo3/Vehicle.java

package com.study.demo3;
public class Vehicle {
    protected String name;

    public Vehicle(String name) {
        this.name = name;
    }
    
    public Vehicle() {
        this.name = "Unknown Vehicle";
    }

    public void start() {
        System.out.println("Vehicle Start");
    }

    public void stop() {
        System.out.println("Vehicle Stop");
    }
}