java - Convert string number to integer number

I have "1" as a string, and I would like to convert it to decimal, 1, as integer.

I tried charAt(), but it returns 49, not 1 integer.

So, what is required to convert the "1" string to 1 integer?

Answer

Use Wrapper Class.

Examples are below

int

int a = Integer.parseInt("1"); // Outputs 1

float

float a = Float.parseFloat("1"); // Outputs 1.0

double

double a = Double.parseDouble("1"); // Outputs 1.0

long

long a = Long.parseLong("1"); // Outputs 1