Here I have a simple class to perform calculator operations.
Calculator.java
private final ArrayList <Double> values
private final String operation;
public Calculator(ArrayList<Double> values, String operation) {
this.values = values;
this.operation = operation;
}
public double calculate(){
double num1 = values.get(0);
double num2 = values.get(1);
double answer;
switch (operation) {
case
…
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