java接口简单例子

/*接口不是共性的功能,用于扩展功能里面全是 public static final public abstract接口可以被类多实现，接口之间可以多继承*/interface Smoking{public abstract void smoke();}abstract class Student{abstract void study();public void sleep(){System.out.println("sleeping");}}class ZhangSan extends Student implements Smoking{void study(){System.out.println("learning java");}public void smoke(){System.out.println("smoking 中华");}}class InterfaceDemo{public static void main(String[] args){System.out.println("Hello World");ZhangSan s = new ZhangSan();s.study();s.smoke();}}