结构类算法

题目要求

项目结构

1.Action

参考代码

packageProgramDesign.Action;/* * 接口：方法的定义 * */publicinterfaceAction{//定义常量Stringreaction="run";//定义抽象方法publicabstractvoidact();//定义静态方法publicstaticvoidinfo(){System.out.println("这是静态方法");}//定义默认方法，输出常量reactiondefaultvoidshout(){System.out.println(reaction);}}

packageProgramDesign.Action;publicclassTestAction{publicstaticvoidmain(String[]args){//匿名内部类实现接口ActionActionaction=newAction(){@Overridepublicvoidact(){System.out.println("实现act方法");}};//调用实现后的act()方法action.act();//调用接口的info()方法Action.info();//调用默认方法shout()action.shout();}}

运行效果

2.Colorable

step1:写接口和父类

packageProgramDesign.Colorable;//定义一个接口Colorable,包含一个方法void setColor(string color)publicinterfaceColorable{publicvoidsetColor(Stringcolor);}

packageProgramDesign.Colorable;//定义一个抽象类，包含一个方法void play()publicabstractclassToy{publicabstractvoidplay();}

step2:写实现类

packageProgramDesign.Colorable;//Car类，继承自Toy类，并实现Colorable接口publicclassCarextendsToyimplementsColorable{privateStringcolor;@OverridepublicvoidsetColor(Stringcolor){this.color=color;}@Overridepublicvoidplay(){System.out.println("正在玩"+color+"的玩具车");}}

packageProgramDesign.Colorable;//Doll类，继承自Toy类，并实现Colorable接口publicclassDollextendsToyimplementsColorable{privateStringcolor;@OverridepublicvoidsetColor(Stringcolor){this.color=color;}@Overridepublicvoidplay(){System.out.println("正在玩"+color+"的玩具娃娃");}}

step3:写测试类

packageProgramDesign.Colorable;/* * 测试类： * 1.实例化Car和Doll对象，并分别调用setColor方法设置他们的颜色为"红色"和"蓝色" * 2.分别调用play()方法，打印出"正在玩红色的玩具车"和"正在玩蓝色的玩具娃娃" * */publicclassTestToy{publicstaticvoidmain(String[]args){Carcar=newCar();car.setColor("红色");car.play();Dolldoll=newDoll();doll.setColor("蓝色");doll.play();}}

运行效果