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AP Computer Science a Flashcards: Methods Passing And Returning References

Study Methods Passing And Returning References in AP Computer Science a with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

Which keyword is necessary to return an object from a method?

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ANSWER

return. Required for all method returns.

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AP Computer Science a: Class Creation

You are hereMethods: Passing and Returning References36 cards

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What this deck covers

This deck focuses on Methods Passing And Returning References, giving you a quick way to review the definitions, rules, and examples that matter most for AP Computer Science a.

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Practice questions

1 of 15Practice questions for this set
Based on the code snippet above, what is returned by the method deposit? Describe its significance. 
public class BankAccount {
    private String accountNumber;
    private double balance;

    public BankAccount(String accountNumber, double balance) {
        this.accountNumber = accountNumber;
        this.balance = balance;
    }

    // Adds funds to this account
    public void deposit(double amount) {
        balance += amount;
    }

    // Deposits then returns this same account reference
    public BankAccount depositAndReturn(double amount) {
        deposit(amount);
        return this;
    }

    public double getBalance() {
        return balance;
    }

    public static void main(String[] args) {
        BankAccount acct = new BankAccount("A100", 50.0);
        BankAccount ref = acct.depositAndReturn(25.0);
        System.out.println(acct.getBalance());
        System.out.println(ref.getBalance());
    }
}
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