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Decode the Coding Interview in Java: Real-World Examples

DIY: Basic Calculator II

Understand how to implement a function in Java that evaluates string expressions containing integers and operators like addition, subtraction, multiplication, and division. Learn to parse expressions carefully, handle integer division rounding, and return accurate results without relying on built-in evaluation functions.

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Problem statement

In this challenge, you are given a string, s, which contains an expression. You’ll evaluate this expression and return its value. Keep the following statements in mind while solving the problem:

  • The integer division should be rounded off to the nearest smallest integer.
  • The given expression is always valid, giving the intermediate result in the range of [[-2312^{31}
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