how do i fix this error " possible loss of precision found int required char ch = input.read()"

this is the code

import java.io.InputStreamReader; import java.io.IOException;

class Test1 {

public static void main(String[] args)

{
    InputStreamReader input = new InputStreamReader(System.in);
    char ch;


    System.out.println("Input y to continue");
    do
    {
        ch = input.read();
    }
    while (ch !='y');


    System.out.println("thank you for pressing Y" );
}

}