Package cs2110

Interface Operator

public interface Operator
Represents a binary arithmetic operator on real numbers. Interface also defines singleton operators for common operations.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final Operator
    ADD
    Operator for addition.
    static final String
    ADD_SYMBOL
     
    static final Operator
    DIVIDE
    Operator for division.
    static final String
    DIVIDE_SYMBOL
     
    static final Operator
    MULTIPLY
    Operator for multiplication.
    static final String
    MULTIPLY_SYMBOL
     
    static final Operator
    POW
    Operator for exponentiation.
    static final String
    POW_SYMBOL
     
    static final Operator
    SUBTRACT
    Operator for subtraction.
    static final String
    SUBTRACT_SYMBOL
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static Operator
    fromString(String op)
    Return a known operator given its symbol, `op`.
    static boolean
    isOperator(String symbol)
    Return whether `symbol` is a recognized operator symbol (i.e., one that could be passed to `fromString()`).
    double
    operate(double operand1, double operand2)
    Return the result of evaluating the operation on left operand `operand1` and right operand `operand2`.
    String
    symbol()
    Return the symbol used to represent this operator in expression strings.

  • Field Details

  • Method Details

    • operate

      double operate(double operand1, double operand2)
      Return the result of evaluating the operation on left operand `operand1` and right operand `operand2`.

    • symbol

      String symbol()
      Return the symbol used to represent this operator in expression strings. For example, the "plus" operator would have symbol "+".

    • fromString

      static Operator fromString(String op)
      Return a known operator given its symbol, `op`. Guaranteed to recognize "+", "-", "*", "/", "^".

    • isOperator

      static boolean isOperator(String symbol)
      Return whether `symbol` is a recognized operator symbol (i.e., one that could be passed to `fromString()`). Guaranteed to recognize "+", "-", "*", "/", "^".