How can I check if an input is a integer or String, etc.. in JAVA?

Question

I am wondering how I can check if a user\'s input is a certain primitive type (I mean integer, String, etc... I think it\'s called primitive type?). I want a user to input s

Answer 1

class Main{
    public static void main(String args[]){
        String str;
        Scanner sc=new Scanner(System.in);
        int n,
        boolean flag=false;
        while(!flag){
            try{
                str=sc.nextLine();
                n=Integer.parseInt(str);
                flag=true;
            }
            catch(NumberFormatException e){
                System.out.println("enter an no");
                str=sc.nextLine();
            }
        }
    }
}