Binary to Decimal Converter
Easy
30
1
78.5% Acceptance
In this lab, you'll write a method named binaryToDecimal
in the Main
class that converts a binary number (input as a string) to its decimal equivalent. The method should be robust, handling valid inputs correctly and throwing an IllegalArgumentException
for invalid inputs.
Requirements
- Method Name: The method must be named
binaryToDecimal
. - Input: Accepts one string argument representing a binary number (e.g., "1010").
- Output: Returns the decimal equivalent of the input binary string.
- Error Handling: If the input string contains any characters other than "1" and "0", throw an
IllegalArgumentException
.
Edge Cases
- Valid Binary String: The method should correctly convert binary strings to decimal numbers.
- Invalid Characters: The method should throw an
IllegalArgumentException
for strings containing characters other than '0' and '1'. - Empty String: Consider how your method should behave with an empty string input.
Examples
binaryToDecimal("1010")
should return10
.binaryToDecimal("111")
should return7
.binaryToDecimal("1001")
should return9
.