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58 lines (49 loc) · 2.1 KB
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import com.h2.*;
import java.util.Arrays;
import java.util.Map;
public class Finance {
public final static String BEST_LOAN_RATES = "bestLoanRates";
public final static String SAVINGS_CALCULATOR = "savingsCalculator";
public final static String MORTGAGE_CALCULATOR = "mortgageCalculator";
public final static Map<String, String > commandsToUsage =
Map.of(BEST_LOAN_RATES, "usage: bestLoanRates",
SAVINGS_CALCULATOR, "usage: savingsCalculator <credits separated by ','> <debits separated by ','>",
MORTGAGE_CALCULATOR, "usage: mortgageCalculator <loanAmount> <termInYears> <annualRate>");
private static boolean validateCommandArguments(String[] args){
switch (args[0]){
case BEST_LOAN_RATES: return (args.length == 1);
case SAVINGS_CALCULATOR: return (args.length == 3);
case MORTGAGE_CALCULATOR: return (args.length == 4);
}
return false;
}
private static void executeCommand(String command, String[] arguments){
switch (command){
case BEST_LOAN_RATES:
System.out.print("Finding best loan rates ..."+ "/n");
BestLoanRates.main(arguments);
return;
case SAVINGS_CALCULATOR:
System.out.print("Finding your net savings ..."+ "/n");
SavingsCalculator.main(arguments);
return;
case MORTGAGE_CALCULATOR:
System.out.print("Finding your monthly payment ..."+ "/n");
MortgageCalculator.main(arguments);
return;
}
}
public static void main(String[] args){
String command = args[0];
if(!commandsToUsage.containsKey(command)) {
System.out.print(command + ": command not found"+"\n");
return;
}
boolean isValidCommand = validateCommandArguments(args);
if (!isValidCommand) {
System.out.print(commandsToUsage.get(args[0])+"\n");
return;
}
executeCommand(command, Arrays.copyOfRange(args, 1, args.length));
}
}