What are the methods of converting string to int?

How to convert string to int: 1. Use the [parseInt()] method in the Integer class to convert String to int; 2. Use the [valueOf()] and [intValue()] in the Integer class Method; 3. First judge the regular expression and dynamically select the method to convert the data.

String to int method:

1. String to int method 1, use parseInt in the Integer class ()method.

2. String to int method 2, use the valueOf() and intValue() methods in the Integer class.

#3. Use regular expressions to determine whether String is integer or floating-point data. Dynamically select methods to transform data.

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