bankaccount.java

Java 入门书的源码

//Copyright (c) 1998, Arthur Gittleman
//This example is provided WITHOUT ANY WARRANTY either expressed or implied.

/* Declare a BankAccount class with an account balance 
 * attribute, a constructor, and deposit and getBalance
 *  operations.  Create and use some BankAccount objects.
 */

public class BankAccount {
  private int balance;
  BankAccount()   {    
    balance = 0;
  }
  public void deposit(int amount) {
    balance += amount;
  }
  public int getBalance() {
    return balance;
  }
  public static void main (String [ ] args) {
    BankAccount myAccount = new BankAccount();
    System.out.println("My balance = " + myAccount.getBalance());
    myAccount.deposit(10000);
    System.out.println("My balance = " + myAccount.getBalance());
    BankAccount  yourAccount;
    yourAccount = new BankAccount();
    yourAccount.deposit(123456);
    System.out.println("Your balance = " + yourAccount.getBalance());
  }
}