//assignment 7, lab 2//convert different currenciesimport java.util.*;public class ass7{ public static void main(){ double cash_in; Currencyconv sek_pula = new Currencyconv(1.65); Currencyconv sek_rand = new Currencyconv(1.14); Scanner s = new Scanner(System.in); System.out.println("How many SEK? Result in pula"); cash_in = s.nextDouble(); System.out.println("That is "+sek_pula.returnCurr2(cash_in)+" Pula"); }}class Currencyconv{ /* This class assumes that the exchange rate is in the format of curr1/curr2, that is to say that if an instance is called sek_usd the rate should be around 8 or so */ //internal variables private double cash_in, cash_out, rate; //constructors public Currencyconv(double rate_in){ if(rate_in < 0){ rate=0; } else{ rate=rate_in; } } //methods //returns currency 2 given currency 1 public double returnCurr2(double cash_in){ if( cash_in < 0){ cash_out=0; } else{ cash_out=cash_in*rate; } return cash_out; } //returns currency 1 given currency 2 public double returnCurr1(double cash_in){ if( cash_in < 0){ cash_out=0; } else{ cash_out=cash_in/rate; } return cash_out; } //set the exchange rate to something different public void changeRate(double rate_in){ if( rate_in < 0){ rate=0; } else{ rate=rate_in; } }}