What's wrong with my code?

Question

import java.util.*;
class Student
{
public int rollno;
public String name;
Student(int rollno,String name)
{
this.rollno=rollno;
this.name=name;
}
void output()
{
System.out.println("Name of student:"+name);
System.out.println("Rollno:"+rollno);
}
}
class Student1 extends Student
{
double height;
int weight;
Student1(int rollno,String name,double height,int weight)
{
super(rollno,name);
this.height =height;
this.weight =weight;
}
void output()
{
super.output();
System.out.println("Height:"+height);
System.out.println("Weight:"+weight);
}
public static void main(String args[])
{
Scanner obj1=new Scanner(System.in);
System.out.println("Enter rollno:");
rollno=obj1.nextInt();
System.out.println("Enter name:");
name=obj1.next();
System.out.println("Enter height:");
height=obj1.nextDouble();
System.out.println("Enter weight:");
weight=obj1.nextInt();
Student1 s1 = new Student1(rollno,name,height,weight);
s1.output();
}
}

Answer 1

maha Lakshmi ,

sorry to say, but this code has a poor readability. if you expect people to help, you should put some effort in giving a well formatted source code.
this is a link to the guideline for people that are doing code for google:

https://google.github.io/styleguide/javaguide.html

Answer 2

because Student1 object doesn't exist, variables in main() are local and undeclared, add this to main()

String name; int rollno, weight; double height;

Answer 3

maha Lakshmi

You didn't define data type in main method variable.

https://code.sololearn.com/c3Of755Jce7s/?ref=app

Answer 4

or use beautifier
https://codebeautify.org/javaviewer