标签:name void height Code1.1 Human public Superman
代码
多态
向上转型,向下转型
static,final
public class Nineteen {
public static void main(String[] args) {
Human h1 = new Superman();
h1.setName("Clark");
h1.setHeight(180.0);
h1.show();
Human.communication();
h1.move();
Superman s1 = (Superman) h1;
s1.duty();
System.out.println("--------");
Superman h2 = new Superman("David", 179.0);
h2.show();
Human.communication();
h2.move();
h2.duty();
}
}
class Human {
private String name;
static private double height;
final static private String COUNTRY = "American";
public Human() {
}
public Human(String name, double height) {
this.name = name;
Human.height = height;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setHeight(double height) {
Human.height = height;
}
public double getHeight() {
return height;
}
public void show() {
System.out.println(" " + COUNTRY);
}
public static void communication() {
System.out.println("speak " + COUNTRY + " language");
}
public void move() {
System.out.println("walk");
}
}
class Superman extends Human {
public Superman() {
}
public Superman(String name, double height) {
super(name, height);
}
public void show() {
System.out.print(getName() + " " + getHeight());
super.show();
}
public void move() {
System.out.println("fly");
}
public void duty() {
System.out.println("save lives");
}
}
标签:name,void,height,Code1.1,Human,public,Superman 来源: https://blog.csdn.net/weixin_54231215/article/details/112462476
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