package 综合抽象接口练习;public class person {protected String name;protected int age;person(){}person(String name,int age){this.name=name;this.age=age;}public void setName(String name){this.name=name;}public String getName(){return name;}public void setAge(int age){this.age=age;}public int getAge(){return age;}
}

package 综合抽象接口练习;public abstract class coach extends person{public coach(){};public coach(String name,int age){super(name, age);}public abstract void teach();
}

package 综合抽象接口练习;public abstract class  player  extends person {public player(){};public player(String name,int age){super(name, age);}public abstract void study();
}

 接口：

package 综合抽象接口练习;public interface speaking_English {public abstract void speakEnglish();
}

package 综合抽象接口练习;public class 乒乓player extends player implements speaking_English {public 乒乓player(){};public 乒乓player(String name,int age){super(name, age);}@Overridepublic void speakEnglish(){System.out.println("乒乓球运动员在说英语");}@Overridepublic void study(){System.out.println("乒乓球运动员会打篮球哦");}}

package 综合抽象接口练习;public abstract class 乒乓球coach extends coach implements speaking_English{public 乒乓球coach(){};public 乒乓球coach(String name,int age){super(name, age);}@Overridepublic void teach(){System.out.println("教练在教我打乒乓球");}@Overridepublic void speakEnglish(){System.out.println("乒乓球教练在学习说英语");}}

package 综合抽象接口练习;public abstract class 篮球coach extends coach{public 篮球coach(){};public 篮球coach(String name,int age){super(name, age);}@Overridepublic void teach(){System.out.println("篮球教练正在教如何打篮球");}
}

package 综合抽象接口练习;public class 篮球player extends player{public 篮球player(){};public 篮球player(String name,int age){super(name, age);}@Overridepublic void study(){System.out.println("篮球运动员会打篮球哦");}
}

package 综合抽象接口练习;public class test {public static void main(String[] args) {//创建运动员或者教练对象乒乓player ps1=new 乒乓player("王楚钦",24);System.out.println(ps1.getName()+","+ps1.getAge());ps1.study();ps1.speakEnglish();}
}