java入门第二季–多态–java中的抽象类

java 中的抽象类

代码实现

Telphone.java

package com.imooc;

public abstract class Telphone {
public abstract void call();
public abstract void message();
}

/javaDemo5/src/com/imooc/CellPhone.java
package com.imooc;

public class CellPhone extends Telphone {

public void call() {
// TODO Auto-generated method stub
System.out.println(“ 通过键盘来打电话 ”);
}

public void message() {
// TODO Auto-generated method stub
System.out.println(“ 通过键盘来打短信 ”);
}

}

SmartPhone.java
package com.imooc;

public class SmartPhone extends Telphone {

public void call() {
// TODO Auto-generated method stub
System.out.println(“ 通过语音来打电话 ”);
}

public void message() {
// TODO Auto-generated method stub
System.out.println(“ 通过语音来发短信 ”);
}

}

/javaDemo5/src/com/imooc/Initail.java
package com.imooc;

public class Initail {

public static void main(String[] args) {
// TODO Auto-generated method stub
Telphone tel1 = new CellPhone();
tel1.call();
tel1.message();

Telphone tel2 = new SmartPhone();
tel2.call();
tel2.message();
}

}

运行