I need help with this code

Question

Package demoproject;
Public class myclass{
public static void main(String[]args)
{
System.out.println("Someone solve this code errors for me please");
// Am just a beginner at the java course please help!!!
string name =(" David");
String location =(" Ghana");
int age = (23);
Double height = (153.45);
char grade = (A);
System.out.println( "name", "location" );
System.out.println( "age", "height", "grade");
}
}

Answer 1

//package demoproject;
public class myclass {
public static void main(String[]args)
{
System.out.println("Someone solve this code errors for me please");
// Am just a beginner at the java course please help!!!
String name =" David";
String location =" Ghana";
int age = 23;
double height = 153.45;
char grade = 'A';
System.out.println( "name: " + name);
/*System.out.println( name );
System.out.println( location );
System.out.println( "age", "height", "grade");
System.out.println( age );
System.out.println( height );
System.out.println( grade );*/
}
}

Answer 2

It is not Sololearn Playground.
What system do use?

https://code.sololearn.com/cpf4y6v4M871/?ref=app

Answer 3

the system says public type myclass should be defined in its own file.
how do i go about that