I'm trying to read certain text file and when I find certain word, I should do another criteria,

in my code (will follow), I get an error, "Type mismatch: cannot convert from int to String" So, the suggested solution by Eclipse is to make the variable (key) integer instead of String what is the wrong thing here ?

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class JNAL {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        File file = new File("C:/20180918.jrn");
        FileInputStream fis = null;

        try {
            fis = new FileInputStream(file);

            System.out.println("Total file size to read (in bytes) : "
                    + fis.available());

            int content;
            String key;
            /*
            while ((content = fis.read()) != -1) {
                // convert to char and display it
                System.out.print((char) content);
            }
            */
            while ((key = fis.read()) == "Cash") {
                // convert to char and display it
                System.out.print((String) key);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (fis != null)
                    fis.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }   
    }
}