Java. Lang. Integer cannot be cast to Java. Lang. String Java int, double to String Conversion and string to int, double Conversion

Count = integer. parseint (string) all. Get (0 ));

Execution error: Java. Lang. classcastexception: Java. Lang. Integer cannot be cast to Java. Lang. String

Solution: change the statement marked in red to Count = integer. parseint (all. Get (0). tostring ());

The operation of this type of forced conversion often occurs in database queries with data results such as Count () and sum (). Pay attention to the conversion method to prevent such errors.

 

Conversion from Java int and double to string and from string to int and double

Double A = double. valueof (m_textstring). doublevalue (); // convert string to double

STR = string. valueof (c); // double, int to string

Int = integer. valueof (STR); // convert string to int