Using Java language type wrappers to convert numeric strings

• Java's println() method automatically converts numeric values ​​for display in the console.

• Methods like read() do not have similar functionality for converting numeric strings to internal binary formats.

• In Java, there is no version of read() that reads a string, like "100", and automatically converts it to a numeric value storable in variables like int.

• Java provides encapsulating classes of primitive types, known as wrappers, to get around this limitation.

• Encapsulating classes include Double, Float, Long, Integer, Short, Byte, Character and Boolean.

• These classes allow the use of primitive types as objects and provide methods for converting numeric strings to binary values.

• String-to-binary conversion methods help integrate primitive types into Java's object hierarchy.

• Integer wrappers allow you to specify the numeric base for analysis.

• Parse methods (parseInt(), parseDouble(), etc.) make it easy to convert numeric strings to internal formats.

• A common example is calculating the average of numbers entered by the user.
  parseInt() converts a string to an integer to determine the number of values.

• parseDouble() converts strings of numeric values ​​to double for calculating the average.

The above is the detailed content of Using Java language type wrappers to convert numeric strings. For more information, please follow other related articles on the PHP Chinese website!