java继承的代码 java继承的用法

JAVA:编写一个动物的继承关系代码.

下面是一个简单的 Java 程序示例,用于实现山羊和狼的继承关系,并在测试类中进行验证:

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Animal.java:

```java

public abstract class Animal {

public void walk() {

System.out.println("走路");

}

public abstract void eat();

}

```

Goat.java:

```java

public class Goat extends Animal {

@Override

public void eat() {

System.out.println("吃草");

}

}

```

Wolf.java:

```java

public class Wolf extends Animal {

@Override

public void eat() {

System.out.println("吃肉");

}

}

```

AnimalTest.java:

```java

public class AnimalTest {

public static void main(String[] args) {

Goat goat = new Goat();

wolf wolf = new wolf();

goat.eat(); // 输出:吃草

wolf.eat(); // 输出:吃肉

goat.walk(); // 输出:走路

wolf.walk(); // 输出:走路

}

}

```

在此程序中,我们定义了一个 `Animal` 类作为基类,包含了所有动物都会有的行为(例如走路),并使用抽象方法 `eat()` 表示不同动物腊誉的饮食习惯。然后通过继承实现 `Goat` 和 `Wolf` 两个子类,并分别重写判缓 `eat()` 方法。

在测试类中,我们分别创建了一个 `Goat` 和一个 `Wolf` 对象,并分别调用其 `eat()` 和 `walk()` 方法进行验证。可以看到,不同的动物具备不同的饮食习惯,但轮冲段它们的走路行为是一致的。

java编写动物世界的继承关系代码

我写了一个,内容比较简单的。代码如下:public class AnimalTest {

Animal animal;

public void eat(Animal animal){

animal.eat();

}

public void walk(Animal animal){

animal.walk();

}

public static void main(String args[]){

Animal animal=new Animal("animal");

Wolf w=new Wolf("wolf");

Goat g=new Goat("羡棚goat");

AnimalTest at=new AnimalTest();

at.eat(animal);

at.eat(w);

at.eat(g);

at.walk(animal);

at.walk(w);

at.walk(g);

}

}

class Animal {

String name;

public Animal(String name){

this.name=name;

}

public Animal(){}

public void setName(String name){

this.name=name;

}

public String getName(){

return name;

}

public void eat(){

System.out.println("animal eat");

}

public void walk(){

System.out.println("animal walk");

}

public String toString(){

return name;

}

}class Wolf extends Animal {

public Wolf(String name){

super(name);

}

public Wolf(){}

public void eat(){

System.out.println("wolf eat meat");

}

public void walk(){

System.out.println("wolf walk");

}

public String toString(){

return name;

}

}class Goat extends Animal {

public Goat(String name){

super(name);

}

public Goat(){}

public void eat(){

System.out.println("改派坦核桐goat eat grass");

}

public void walk(){

System.out.println("goat walk");

}

public String toString(){

return name;

}

}

java 类的继承,求大神给代码

public class JIhe {

private String color;

private String dateCreated;

private String filled;

public String getColor() {

return color;

}

public String getDateCreated() {

return dateCreated;

}

public String getFilled() {

return filled;

}

public void setColor(String color) {

this.color = color;

}

public void setFilled(String filled) {

this.filled = filled;

}

@Override

public String toString() {

return "Color:" + this.color +" filled:" + this.filled + "detaCreated:" + dateCreated;

}

}

------------------------------------------------------------------------------------------------------------

public class Circle extends JIhe {

private double radius;

public double getRadius() {

return radius;

}

public void setRadius(double radius) {

this.radius = radius;

}

public double getArea() {

return 3.14 * this.radius * this.radius;

}

public double getPerimeter() {

return 2 * 3.14 * this.radius;

}

public double getDiameter() {

return 2 * this.radius;

}

}

-----------------------------------------------------------------------------------------------------

public class Rectangle extends JIhe {

private double width;

private double height;

public double getWidth() {

return width;

}

public void setWidth(double width) {

this.width = width;

}

public double getHeight() {

return height;

}

public void setHeight(double height) {

this.height = height;

}

public double getArea(){

return this.width * this.height;

}

public double getPerimeter(){

return this.width * 2 + this.height * 2;

}

}

——庆腔简——————誉裤———圆知———————————————————————————

public class Test {

public static void main(String[] args){

Circle circle = new Circle();

circle.setRadius(1.0);

System.out.println(circle.getArea());

System.out.println(circle.getColor());

System.out.println(circle.getDateCreated());

System.out.println(circle.getDiameter());

System.out.println(circle.getFilled());

System.out.println(circle.getPerimeter());

System.out.println(circle.getRadius());

Rectangle r = new Rectangle();

r.setHeight(2.0);

r.setWidth(4.0);

System.out.println(r.getArea());

System.out.println(r.getColor());

System.out.println(r.getDateCreated());

System.out.println(r.getFilled());

System.out.println(r.getHeight());

System.out.println(r.getPerimeter());

System.out.println(r.getWidth());

}

}

JAVA 继承的代码 求帮助 在线等

简单写了下,希望空型对你有帮助

建议你找一下Java转型方面的资料

class Vehicle{

protected void vehicleRun(){

System.out.println("vehicle!!!");

}

}

class Truck extends Vehicle{

//子类覆写父类“vehicleRun方法”

protected void vehicleRun(){

System.out.println("It's Truck!!!");

}

protected void truckRun(){

System.out.println("源基truck!!!");

}

}

class Test{

public static void main(String [] args){

Vehicle v = new Vehicle();

v.vehicleRun(); //父类方法

//向上转型

Vehicle v1 = new Truck();

v1.vehicleRun(); //子类覆写后方法

//雹亏谨向下转型

Truck t = (Truck)v1;

t.vehicleRun();

t.truckRun();

}

}


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