Question

Implement in Java: the Bank constructor and the accountExists method in the below class. The requirements stated in the comments" in green" class Bank { HashSet<Integer> accounts HS; /**Initialize the hash set and copy the values from the given array accounts to the hashset accounts HS*/ Bank(Integer[] accounts) { /*Your code should go here*/ } /** Check if account exists in the hashset accounts HS * return true if exists and false otherwise*/ Boolean accountExists(Integer account) { /*Your code should go here*/ } }

Answer 1

import java.util.Arrays;

import java.util.HashSet;

class Bank {

HashSet<Integer> accountsHS;

public Bank(Integer[] accounts) {

accountsHS = new HashSet<>(Arrays.asList(accounts));

}

Boolean accountExists(Integer account) {

return accountsHS.contains(account);

}

}