公共类BankManager {public static void main（string [] args）{bankAccount adamsaccount = new BankAccount（）;adamsaccount.setbalance（100）;system.out.println（“平衡为：” + adamsaccount.getBalance（））;system.out.println（“他撤回14”）；Adamsaccount.DeductFromAccount（14）;system.out.println（“ new Balance是：” + adamsaccount.getBalance（））;}}公共类BankAccount {private int balance;public bankAccount（）{} public void setBalance（int Balance）{this.balance = balance;} public int getBalance（）{返回余额;} public void扣除fromaccount（int撤回）{this.balance = this.balance-撤回; } }

//类“ BankManager”类是文件的超类和名称。公共类BankManager {//通常，您需要在任何代码中使用一个类似于“ main”的代码中的一个类。这是代码将“启动”的地方。public static void main（string [] args）{//使用类创建对象时，将其称为//创建该对象的“实例”。//在这里，我们正在创建一个名为“ Adamsaccount” //-的特定银行帐户，但是我们可以根据需要制作的数量！BankAccount Adamsaccount = new BankAccount（）;//这启动了“ setBalance”方法，该方法接受an // integer（number）作为参数//，因此我们将值100传递给我们银行帐户对象的此//实例的“余额”变量AdamsAccount。setbalance（100）;//使用基本的Java IDE（编程环境）然后//'System.out.println'允许我们将数据输出到屏幕上。//在这里，我们正在输出一个字符串，然后是'getBalance'的返回字符串//此对象的私有整数余额，//我们将其设置为100 system.out.println（“余额为：：“ + adamsaccount.getBalance（））; System.out.println("He withdrew 14"); // This is a first method within our BankAccount class which accepts // another integer parameter // This time though, that number will be deducted from the // balance variable adamsAccount.deductFromAccount(14); // Finally, we retrieve and show the balance once again, which // should now have changed! System.out.println("New balance is: " + adamsAccount.getBalance()); } } public class BankAccount { // This is a private variable belonging to this class, meaning that we can't // access it from our 'main' class // i.e. We could not just write 'system.out.println(balance) // However a subclass - class within a class - would be able to access // this because it would 'inherit' it private int balance; private int interestRate; //This is called a 'constructor' and always needs to be present in a new class public BankAccount() { } // This is the method we reference when we set the balance. // Remember, we passed this method the integer 100, which will // now become the new balance public void setBalance(int balance) { // 'this' means 'this instance of the object'. // In other words, it means that we're talking about adamsAccount, // not any old account! this.balance = balance; } // Notice that this is not a method but rather an integer itself. // Because this返回整数，这意味着我们可以使用此//就像我们的代码公共int getalance（）{return Balance;} //最后，此方法使用一些数学来撤回//从总体余额中撤回的金额公共void扣除fromaccount（int撤回）{this.balance = this.balance -balance -toftal;}}}