what if i will created static BufferReader variable?

public class ConsoleReader {

    static  BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));


    public static String readString() throws Exception {

              String name =  reader.readLine();
return name;
    }

    public static int readInt() throws Exception {

      int a= Integer.parseInt(reader.readLine());
return a;
    }



    public static void main(String[] args) {

    }
}