Java Program: Update Student Grades Using HashMap

import   java . util . Scanner ;  import   java . util . HashMap ;    public   class   Lab7  {        public   static   void   main  ( String []  args ) {           Scanner   scnr  =  new   Scanner ( System . in );           String   studentName ;           double   studentGrade ;            HashMap < String ,  Double >  studentGrades  =  new   HashMap < String ,  Double >();            // Students's grades (pre-entered)            studentGrades . put ( "Harry Rawlins" ,  84.3 );           studentGrades . put ( "Stephanie Kong" ,  91.0 );           studentGrades . put ( "Shailen Tennyson" ,  78.6 );           studentGrades . put ( "Quincy Wraight" ,  65.4 );           studentGrades . put ( "Janine Antinori" ,  98.2 );            // TODO: Read in new grade for a student, output initial            //       grade, replace with new grade in HashMap,            //       output new grade             System . out . print ( "Enter the student full name: " );           studentName  =  scnr . nextLine ();           System . out . print ( "Enter the new grade for the student: " );           studentGrade  =  scnr . nextDouble ();            double   originalGrade  =  studentGrades . get ( studentName );           System . out . println ( studentName  +  "'s original grade is "  +  originalGrade );           studentGrades . put ( studentName ,  studentGrade );           System . out . println ( studentName  +  "'s new grade is "  +  studentGrade );      } }