子类用super操作被隐藏的成员变量和方法
Example5_7.java
class Sum {
int n;
float f() {
float sum=0;
for(int i=1;i<=n;i++)
sum=sum+i;
return sum;
}
}
class Average extends Sum {
int n;
float f() {
float c;
super.n=n;
c=super.f();
return c/n;
}
float g() {
float c;
c=super.f();
return c/2;
}
}
public class Example5_7 {
public static void main(String args[]) {
Average aver=new Average();
aver.n=100;
float resultTwo=aver.g(); float resultOne=aver.f();
System.out.println("resultOne="+resultOne);
System.out.println("resultTwo="+resultTwo);
}
}
使用super调用父类的构造方法
Example5_8.java
class Student {
int number;String name;
Student() {
}
Student(int number,String name) {
this.number=number;
this.name=name;
System.out.println("我的名字是:"+name+ "学号是:"+number);
}
}
class UniverStudent extends Student {
boolean 婚否;
UniverStudent(int number,String name,boolean b) {
super(number,name);
婚否=b;
System.out.println("婚否="+婚否);
}
}
public class Example5_8 {
public static void main(String args[]) {
UniverStudent zhang=new UniverStudent(9901,"何晓林",false);
}
}