Using the IDEA editor - IntelliJ IDEA in Action - page 105

Intentions —Omit the declaration of the answer variable, and let
IDEA note that answer = rate isn't a valid line. Select Create
Local Variable 'answer' from the intention pop-up, and initialize
it to zero.

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Listing 3.2 A basic implementation of a CurrencyService for the

ACME project

package com.acme.conversion.currency.service;

public class FixedRateCurrencyExchangeService
implements CurrencyExchangeService {

private double rate;

public FixedRateCurrencyExchangeService() {
rate = 1.5;
}

public double getRate() {
return rate;
}

public void setRate(double rate) {
this.rate = rate;
}

public double requestCurrentRate(String fromCurrency,
String toCurrency) {
double answer = 0;
if (fromCurrency.equals("USD") &&
toCurrency.equals("CDN")) {
answer = rate;
}
if (fromCurrency.equals("CDN") &&
toCurrency.equals("USD")) {
answer = 1/rate;
}
return answer;
}
}

3.10 Summary

IDEA is a mature and sophisticated IDE for the Java language whose feature set
can be compared favorably against any modern editor on the market. It boasts a