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java繼承對象代碼 java的繼承和實現

寫一個最簡單的JAVA繼承代碼??謝謝

可運行的:

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import java.awt.*;

import java.awt.event.*;

public class BackJFrame extends Frame{

public BackJFrame(){

super("臺球");

setSize(300,300);

setBackground(Color.cyan); //背景

setVisible(true);

addWindowListener(new WindowAdapter()

{

public void windowClosing (WindowEvent e)

{System.exit(0);}

} );

}

public static void main(String args[]){

new BackJFrame();

}

}

java 類的繼承,求大神給代碼

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;

}

}

——————————————————————————————————————

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繼承,子類繼承父類,子類是只允許調用父類的代碼,還是子類擁有了這些代碼

情況是這樣的:

Class Two 繼承了 Class One ,因此就可以使用 printAB() ,

當執行到 語句: t.printAB(), 時,會跳轉到 Class One 中,執行 printAB(),

然后,發現 里面有個 printA(), 于是 去 Class Two中找,因為修飾符為 protected 能被Class One看到,所以 打印 TwoA;

然后,又發現有個 printB() , 于是去Class Two中找,因為修飾符是 private 所以,不能被Class One看到,所以 打印 OneB;

JAVA繼承問題 求代碼

第一個:

public?class?Yaojing?{

protected?String?name;

protected?int?age;

protected?String?gender;

public?void?showBasicInfo()?{

System.out.println(toString());

}

public?void?eatTangSeng()?{

System.out.println("吃飽了");

}

@Override

public?String?toString()?{

return?"Yaojing?[name="?+?name?+?",?age="?+?age?+?",?gender="?+?gender?+?"]";

}

}

第二個類

public?class?Zhizhujing?extends?Yaojing?{

public?void?buildNet(){

System.out.println("蜘蛛在織網");

}

}

第三個類

public?class?Baigujing?extends?Yaojing?{

public?void?beBeauty(){

System.out.println("白骨精");

}

}

用Java繼承和多態實現編寫代碼

代碼如下:

abstract?class?DongWu?{

public?abstract?void?info();

}

class?Bird?extends?DongWu?{

@Override

public?void?info()?{

System.out.println("我是一只鳥。");

}

}

class?Fish?extends?DongWu?{

@Override

public?void?info()?{

System.out.println("我是一條魚。");

}

}

public?class?App5?{

public?static?void?main(String[]?args)?{

DongWu?bird?=?new?Bird();

bird.info();

DongWu?fish?=?new?Fish();

fish.info();

}

}

java繼承

public class Inheritance3

{

public static void main(String[] args)

{

Son son = new Son(); // 這里只是實例化Son類所以只能調用Son中的方法

son.son() ;

Father father = new Son() ;//Son是Father的子類 可以通過子類實例化父類

father.father() ; //調用父類中的方法

Grandpa grandpa = new Son() ; //Son是Father的子類,Father是Grandpa的子類,那么Son也是Grandpa的子類

grandpa.grandpa() ;

}

}

class Grandpa

{

public void grandpa()

{

System.out.println("grandpa");

}

}

class Father extends Grandpa

{

public void father()

{

System.out.println("father");

}

}

class Son extends Father

{

public void son()

{

System.out.println("son");

}

}

新聞名稱:java繼承對象代碼 java的繼承和實現
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