java.io different char handling from string

Question

Does anybody know what is going on here? if I change out char for string, this runs and works, but now it is telling me it expects [] instead of (). When I change them to that it tells me I can't have incompatible types and dereference the char.

import java.io.*;
class In
{
public static void main(String[ ] args) {
char x = new char('c'); //was String x = new String("c");

System.out.print("Return Value :" );
System.out.println(x.toUpperCase() );
}
}

Answer 1

just write char x = 'c';

Answer 2

You are treating x as an object, so it's a must to declare it as one.

Character x = new Character('c');

On the contrary, 'char' is a primitive type.

That's the first thing. The second would be that there isn't a toUpperCase() method in class Character.

Answer 3

You can not create an object from a primitive data type. The keyword new on primitive data type is used for creating an array.
But you may want to use...
char x = 'c';
System.out.println(Character.toUpperCase(x));