animal.java

来自「初学者很好的一本入门书籍」· Java 代码 · 共 40 行

public class Animal
{
	private int legs;
	
	public Animal()
	{
		setLegs(4);
	}
	
	public Animal(int l)
	{
		setLegs(l);
	}
	
	public void eat()
	{
		System.out.println("Eating");
	}
		
	public void move()
	{
		System.out.println("Moving");
	}
	
	public void setLegs(int l)
	{
		if (l != 0 && l != 2 && l != 4)
		{
			System.out.println("Wrong number of legs!");
			return;
		}
		
		legs=l;
	}
	
	public int getLegs()
	{
		return legs;
	}
}