Java Programming

/** This class represents nonnegative amounts of money. */ public class Money { // The number of dollars private long dollars; // The number of cents private long cents; /** Constructor @param amount The amount in decimal format. */ public Money(double amount) { if (amount < 0) { System.out.println("Error: Negative amounts " + "of money are not allowed."); System.exit(0); } else { long allCents = Math.round(amount * 100); dollars = allCents / 100; cents = allCents % 100; } } // ADD LINES FOR TASK #1 HERE // Document and write a copy constructor /** The add method @param otherAmount The amount of money to add. @return The sum of the calling Money object and the parameter Money object. */ public Money add(Money otherAmount) { Money sum = new Money(0); sum.cents = this.cents + otherAmount.cents; long carryDollars = sum.cents / 100; sum.cents = sum.cents % 100; sum.dollars = this.dollars + otherAmount.dollars + carryDollars; return sum; } /** The subtract method @param amount The amount of money to subtract. @return The difference between the calling Money object and the parameter Money object. */ public Money subtract (Money amount) { Money difference = new Money(0); if (this.cents < amount.cents) { this.dollars = this.dollars - 1; this.cents = this.cents + 100; } difference.dollars = this.dollars - amount.dollars; difference.cents = this.cents - amount.cents; return difference; } /** The compareTo method @param amount The amount of money to compare against. @return -1 if the dollars and the cents of the calling object are less than the dollars and the cents of the parameter object. 0 if the dollars and the cents of the calling object are equal to the dollars and cents of the parameter object. 1 if the dollars and the cents of the calling object are more than the dollars and the cents of the parameter object. */ public int compareTo(Money amount) { int value; if(this.dollars < amount.dollars) value = -1; else if (this.dollars > amount.dollars) value = 1; else if (this.cents < amount.cents) value = -1; else if (this.cents > amount.cents) value = 1; else value = 0; return value; } // ADD LINES FOR TASK #2 HERE // Document and write an equals method // Document and write a toString method }