Given the following code: ``java public enum USCurrency { PENNY (1), NICKLE (5), DIME (10), QUARTER (25); int value; private USCurrency (int value) { this.value = value; } } public class Coin {…

Question

public enum USCurrency {
 PENNY (1),
 NICKLE (5),
 DIME (10),
 QUARTER (25);

 int value;

 private USCurrency (int value) {
 this.value = value;
 }
}

public class Coin {
 public static void main (String[] args) {
 USCurrency usCoin = new USCurrency.DIME;
 System.out.println(usCoin.getValue());
 }

 public int getValue() {
 return value;
 }
}

Options

• ANest the USCurrency enumeration declaration within the Coin class.
• BMake the USCurrency enumeration constructor private.
• CRemove the new keyword from the instantiation of USCoin.
• DMake the getter method of value as a static method.
• EAdd the final keyword in the declaration of value.

• A
  17% (4)
• B
  71% (17)
• D
  4% (1)
• E
  8% (2)

Explanation

Two compile errors exist in this code: new is incorrectly used to reference an enum constant, and enum constructors must be declared private. Option C removes the illegal new keyword - enum constants like DIME are pre-created singleton instances accessed directly via USCurrency.DIME, not constructed with new. Option B ensures the enum constructor is private, which is required by Java; using public or protected on an enum constructor is a compile-time error.

Why the distractors are wrong:

• A - Nesting USCurrency inside Coin is valid Java but unnecessary; the two-class structure is not the source of the errors.
• D - Making getValue() static doesn't help because the method lives in Coin, not USCurrency, so calling it on a USCurrency reference is still invalid regardless of static.
• E - Adding final to the value field affects mutability, not compilation; it is unrelated to either error.

Memory tip: Think of enum constants as pre-built objects stored in a catalog - you look them up (USCurrency.DIME), you never build them with new. And because only the enum itself should create its own instances, constructors are always private - no outside construction allowed.

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