JavaFX Classes

The Customer Example

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1. def customer = Customer {  
2.      firstName: "John";  
3.      lastName: "Doe";  
4.      phoneNum: "(408) 555-1212"  
5.      address: Address {  
6.           street: "1 Main Street";  
7.           city: "Santa Clara";  
8.           state: "CA";  
9.           zip: "95050";  
10.      }  
11. }  
12.   
13. customer.printName();  
14. customer.printPhoneNum();  
15. customer.printAddress();  
16.   
17. class Address {  
18.      var street: String;  
19.      var city: String;  
20.      var state: String;  
21.      var zip: String;  
22. }  
23.   
24. class Customer {  
25.      var firstName: String;  
26.      var lastName: String;  
27.      var phoneNum: String;  
28.      var address: Address;  
29.   
30.     function printName() {  
31.         println("Name: {firstName} {lastName}");  
32.     }  
33.   
34.     function printPhoneNum(){  
35.         println("Phone: {phoneNum}");  
36.     }  
37.   
38.     function printAddress(){  
39.         println("Street: {address.street}");  
40.         println("City: {address.city}");  
41.         println("State: {address.state}");  
42.         println("Zip: {address.zip}");  
43.     }  
44. }  

def customer = Customer {
     firstName: "John";
     lastName: "Doe";
     phoneNum: "(408) 555-1212"
     address: Address {
          street: "1 Main Street";
          city: "Santa Clara";
          state: "CA";
          zip: "95050";
     }
}

customer.printName();
customer.printPhoneNum();
customer.printAddress();

class Address {
     var street: String;
     var city: String;
     var state: String;
     var zip: String;
}

class Customer {
     var firstName: String;
     var lastName: String;
     var phoneNum: String;
     var address: Address;

    function printName() {
        println("Name: {firstName} {lastName}");
    }

    function printPhoneNum(){
        println("Phone: {phoneNum}");
    }

    function printAddress(){
        println("Street: {address.street}");
        println("City: {address.city}");
        println("State: {address.state}");
        println("Zip: {address.zip}");
    }
}

Inheriting from Other Class
他のクラスを継承する

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1. abstract class Account {  
2.   
3.      var accountNum: Integer;  
4.      var balance: Number;  
5.   
6.      function getBalance(): Number {  
7.           return balance;  
8.      }  
9.   
10.      function deposit(amount: Number): Void {  
11.           balance += amount;  
12.      }  
13.   
14.      function withdraw(amount: Number): Void {  
15.           balance -= amount;  
16.      }  
17. }  

abstract class Account {

     var accountNum: Integer;
     var balance: Number;

     function getBalance(): Number {
          return balance;
     }

     function deposit(amount: Number): Void {
          balance += amount;
     }

     function withdraw(amount: Number): Void {
          balance -= amount;
     }
}

ここの abstract は、Account objects は直接作成できないことを意味している
Account を継承したクラスは次のようになる

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1. class SavingsAccount extends Account {  
2.   
3.      var minBalance = 100.00;  
4.      var penalty = 5.00;  
5.   
6.      function checkMinBalance() : Void {  
7.           if(balance < minBalance){  
8.                balance -= penalty;  
9.           }  
10.      }  
11. }  

class SavingsAccount extends Account {

     var minBalance = 100.00;
     var penalty = 5.00;

     function checkMinBalance() : Void {
          if(balance < minBalance){
               balance -= penalty;
          }
     }
}

この場合、Account の変数と関数はそのまま保持されて、新たに minBalance と　penalty 変数と checkMinBalance 関数が追加されている

Account の関数を上書きするには override を使う

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1. class CheckingAccount extends Account {  
2.   
3.   var hasOverDraftProtection: Boolean;  
4.   
5.   override function withdraw(amount: Number) : Void {  
6.     if(balance-amount<0 and hasOverDraftProtection){  
7.   
8.     // code to borrow money from an   
9.     // overdraft account would go here  
10.   
11.     } else {  
12.       balance -= amount;   
13.       // may result in negative account balance!  
14.     }  
15.   }  
16. }  

class CheckingAccount extends Account {

  var hasOverDraftProtection: Boolean;

  override function withdraw(amount: Number) : Void {
    if(balance-amount<0 and hasOverDraftProtection){

    // code to borrow money from an 
    // overdraft account would go here

    } else {
      balance -= amount; 
      // may result in negative account balance!
    }
  }
}