Java中如何通过子类实现基础继承练习？

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java// Java 应用程序，实现父子类之间的继承关系

// 父类：鸟class Bird { public void fly() { System.out.println(鸟在飞翔。); }}

// 子类：麻雀class Sparrow extends Bird { public void chirp() { System.out.println(麻雀在啾啾叫。); }}

// 子类：鹏鸟class Falcon extends Bird { public void soar() { System.out.println(鹏鸟在翱翔。); }}

// 子类：鹤class Crane extends Bird { public void call() { System.out.println(鹤在高声鸣叫。); }}

// 主类public class Main { public static void main(String[] args) { Sparrow sparrow=new Sparrow(); Falcon falcon=new Falcon(); Crane crane=new Crane();

sparrow.fly(); sparrow.chirp();

falcon.fly(); falcon.soar();

crane.fly(); crane.call(); }}

1．写一个Java应用程序，主要是体现父类子类间的继承关系。父类：鸟，子类：麻雀、鸵鸟、鹰。子类继承父类的一些特点，如都是鸟的话就都会有翅膀、两条腿等，但它们各自又有各自的特点，如麻雀的年龄、体重；鸵鸟的身高、奔跑速度；鹰的捕食、飞翔高度等。

package d; public class Bird { int leg=2; int chibang=2; public void cry(){ System.out.println("@#$%^%^&*~~"); } } package d; public class Maque extends Bird{ int age; int weight; public void setAge(int age) { this.age = age; } public void setWeight(int weight) { this.weight = weight; } public void cry(){ System.out.println("Maque-cry"); } public void showMaque(){ System.out.println(age); System.out.println(weight); } } package d; public class tuoniao extends Bird { int height; int speed; public void setHeight(int height) { this.height = height; } public void setSpeed(int weight) { this.speed = speed; } public void cry(){ System.out.println("tuoniao -cry"); } public void showMaque(){ System.out.println(height); System.out.println(speed); } } package d; public class ying extends Bird{ int Catch; int FlySpeed; public void setCatch(int catch1) { Catch = catch1; } public void setFlySpeed(int flySpeed) { FlySpeed = flySpeed; } public void cry(){ System.out.println("ying-cry"); } public void showMaque(){ System.out.println(Catch); System.out.println(FlySpeed); } }