error when convert a string into a number java code example

Example 1: java convert String to int

int i = Integer.parseInt(myString);

Example 2: string to int

int i=Integer.parseInt("200");

Example 3: how to parse a string into a number in java

String toBeParsed = "15";
int parsedString = Integer.parseInt(String.valueOf(toBeParsed));
/*this makes the integer value of parsedString the number held
in the string toBeParsed*/
/*Side note: you will have to import java.lang.String to be
able to use Integer.parseInt() and String.valeOf() */