The java String type to type int

public  static  void main (String [] args) {
         // String type of digital 
        String A = "100" ;
         // Integer number 
        Integer NUM = 99 ;
        
        // the Integer.parseInt () String type is to be converted to an int 
        int the parseInt = the Integer.parseInt (A);
        
        // Integer.valueOf () is converted to the type Integer String type 
        Integer valueOf = Integer.valueOf (A);
        
        // toString () can be converted to a reference type String string type, you must be a reference type, int type not 
        String String = num.toString ();
        
    }