Bird.java

public class Bird {
    private String name;

    public Bird() {
    }

    public Bird(String name) {
        this.name = name;
    }

    public void walk() {
        System.out.println("走路");
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}