Java USES the nesting of conditional operators to complete the division of academic performance

Use the nesting of conditional operators to complete this problem: academic performance > = students with 90 points are denoted by A, those with 60-89 points are denoted by B, and those with less than 60 points are denoted by C.

Program analysis: (a > b) & # 63; a:b This is a basic example of a conditional operator.

Program design:

import javax.swing.*;
public class ex5 {
    public static void main(String[] args){
       String str="";
       str=JOptionPane.showInputDialog(" Please enter the N Value of (input exit Exit) : ");
       int N;
       N=0;
       try{
        N=Integer.parseInt(str);
       }
       catch(NumberFormatException e){
        e.printStackTrace();
        }
       str=(N>90?"A":(N>60?"B":"C"));
       System.out.println(str);
    }  
}