public class Testhidden {
abstract class PhoneCard {
double balance; abstract boolean preformDial(); double getBalance() { return balance; }
} abstract class Number_PhoneCard extends PhoneCard {
long cardNumber;
int password;
String connectNumber;
boolean connected; boolean preformConnection(long cn, int pw) {
if (cn == cardNumber && pw == password) {
connected = true;
return true; } else
return false;
}
} class D200_Card extends Number_PhoneCard {
double add;
double balance; @Override
boolean preformDial() {
if (balance >= (0.5 + add)) {
balance -= (0.5 + add);
return true; } else
return false;
}
} public static void main(String[] args) {
D200_Card my200 = new D200_Card();
my200.balance=50;
System.out.println("父类中隐藏余额为:"+my200.getBalance());
if (my200.preformDial())
System.out.println("子类中隐藏余额为:"+my200.balance);
}}
运行后红色部分显示代码错误 错误信息是
No enclosing instance of type Testhidden is accessible. Must qualify the allocation with an enclosing instance of type Testhidden (e.g. x.new A() where x is an instance of Testhidden).
请各位指点 网上有相关答案 但都没弄懂 希望各位哥哥姐姐们能解释的详细些~多谢了~~~
abstract class PhoneCard {
double balance; abstract boolean preformDial(); double getBalance() { return balance; }
} abstract class Number_PhoneCard extends PhoneCard {
long cardNumber;
int password;
String connectNumber;
boolean connected; boolean preformConnection(long cn, int pw) {
if (cn == cardNumber && pw == password) {
connected = true;
return true; } else
return false;
}
} class D200_Card extends Number_PhoneCard {
double add;
double balance; @Override
boolean preformDial() {
if (balance >= (0.5 + add)) {
balance -= (0.5 + add);
return true; } else
return false;
}
} public static void main(String[] args) {
D200_Card my200 = new D200_Card();
my200.balance=50;
System.out.println("父类中隐藏余额为:"+my200.getBalance());
if (my200.preformDial())
System.out.println("子类中隐藏余额为:"+my200.balance);
}}
运行后红色部分显示代码错误 错误信息是
No enclosing instance of type Testhidden is accessible. Must qualify the allocation with an enclosing instance of type Testhidden (e.g. x.new A() where x is an instance of Testhidden).
请各位指点 网上有相关答案 但都没弄懂 希望各位哥哥姐姐们能解释的详细些~多谢了~~~
abstract class PhoneCard {
double balance; abstract boolean preformDial(); double getBalance() { return balance; }
} abstract class Number_PhoneCard extends PhoneCard {
long cardNumber;
int password;
String connectNumber;
boolean connected; boolean preformConnection(long cn, int pw) {
if (cn == cardNumber && pw == password) {
connected = true;
return true; } else
return false;
}
}
public class D200_Card extends Number_PhoneCard {
double add;
double balance; @Override
boolean preformDial() {
if (balance >= (0.5 + add)) {
balance -= (0.5 + add);
return true; } else
return false;
}
} public static void main(String[] args) {
Testhidden te=new Testhidden();
D200_Card my200=te.new D200_Card();
my200.balance=50;
System.out.println("父类中隐藏余额为:"+my200.getBalance());
if (my200.preformDial())
System.out.println("子类中隐藏余额为:"+my200.balance);
} }