A
类Biycle：
protected String speed;
private int id;
本类中调用main方法：
Biycle bi = new Biycle();
Biycle mb = new MountBiycle();
System.out.println(mb.id);
System.out.println(bi.id);//private实际上是文件访问权限控制，本类这个文件中可以访问
子类：MountBiycle
private String height;
子类中main方法：
MountBiycle mb = new MountBiycle();
System.out.println(mb.speed);
Biycle bi = new Biycle();
System.out.println(bi.speed);//id属性是父类Biycle私有，子类没有继承，并且脱离Biycle类不能够访问
B
public abstract class Animal
{
public void identifyMyself()
{
System.out.println("I am an animal");
}

public static void getName()
{
    System.out.println("Animal");
}

}