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java线继承点代码 java 继承 实现
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java继承问题求完整代码！
参考程序：
public class Student {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public void goHome(Traffic t){
System.out.println("学生:"+this.name);
t.run();
}
public Student(String name) {
this.name = name;
}
}
public abstract class Traffic {
protected double speed;
public void run(){
}
}
public class Bus extends Traffic{
@Override
public void run() {
System.out.println("时速为"+super.speed+"公里每小时的汽车正在嘀嗒嘀嗒的开着.");
}
public Bus(double busSpeed) {
super.speed = busSpeed;
}
}
public class Train extends Traffic {
@Override
public void run() {
System.out.println("时速为"+super.speed+"公里每小时的火车正在况且况且的开着.");
}
public Train(double trainSpeed) {
super.speed = trainSpeed;
}
}
public class AirPlan extends Traffic {
@Override
public void run() {
System.out.println("时速为"+super.speed+"公里每小时的飞机正在吴屋吴屋的开着.");
}
public AirPlan(double airPlanSpeed) {
super.speed = airPlanSpeed;
}
}
public class Test {
public static void main(String[] args) {
Traffic traffic1 = new Bus(40);
Student student = new Student("小明");
student.goHome(traffic1);
Traffic traffic2 = new Train(120);
Student student2 = new Student("小花");
student2.goHome(traffic2);
Traffic traffic3 = new AirPlan(300);
Student student3 = new Student("小红");
student3.goHome(traffic3);
}
}
相关问答
Q1: JAVA继承问题 求代码
第一个:
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("吃饱了");
}
@Override
public String toString() {
return "Yaojing [name=" + name + ", age=" + age + ", gender=" + gender + "]";
}
}
第二个类
public class Zhizhujing extends Yaojing {
public void buildNet(){
System.out.println("蜘蛛在织网");
}
}
第三个类
public class Baigujing extends Yaojing {
public void beBeauty(){
System.out.println("白骨精");
}
}
Q2: 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;
}
}
——————————————————————————————————————
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());
}
}
Q3: Java关于继承的问题，代码如下。
变量相同字父类不会被覆盖，而方法相同子类会覆盖父类方法，java在调用方法时会调用实际new时对象的方法，new Student 那么如果Student中有fun则调用，没有才查找父类中有没有fun方法，而属性会直接根据引用调用，引用是Person，就调用Person的i，写程序时是根据引用来写的，所以不可能你引用Person，会写出子类的属性，比如Student有个自己的属性j，你通过to肯定找不到j，如果引用是Student则调用Student的i，
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