程序代码：

public class DogTest
{
    public static void main(String[] args)
    {
        Dog dog = new Dog();
        dog.run();
    }
}

public class Dog
{
    public void jump()
    {
        System.out.println("jump");
    }
public void run()
    {
        this.jump();
        System.out.println("run");
    }
}