Creating Button Array Error

Question

Rookie here, I'm attempting to create a button array but I get the following errors:
import javax.swing.*;
import java.awt.*;
import java.text.*;
public class CreateButtonArray extends JFrame{
     public static void main(String[] args){     
          CreateButtonArray calcPad = new CreateButtonArray();
          calcPad.setVisible(true);
     public CreateButtonArray(){
          super("Calculator");
               setSize(200, 300);
               setResizable(false);
               setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               setLayout(new BorderLayout());
               JPanel numPad = new JPanel();
               numPad.setLayout(new GridLayout(4, 4, 5, 5));
               add(numPad.CENTER);
               private static final String[] buttons = {  // CreateButtonArray.java:23: illegal start of expression
                   "7", "8", "9", "/",
               "4", "5", "6", "*",
               "1", "2", "3", "-",
               "0", "CE", "C", "+"
               private static final JButton [] calcButtons = new JButton[buttons.length];
                    for(int i = 0; i < buttons.length; i++){  // "for" <-- CreateButtonArray.java:34: illegal start of type
                         JButton b = new JButton(buttons); // buttons.length; <-- CreateButtonArray.java:34: > expected
                         calcButton[i] = b;                              / i++; <-- CreateButtonArray.java:34: <identifier> expected
                         numPad.add(calcButton);                         //
}//CreateButtonArray.java:41: class, interface, or enum expecte

Answer 1

Thank you, AnanSmriti . See I told you I was a rookie. During my travel back home today I read up on Methods and Arrays. It seems I fix (with the forums feedback), I find another one. Here is my latest error. Again, thanks all for your assistance. This is very educational.
Error: CreateButtonArray.java:40: cannot find symbol
symbol : method add(javax.swing.JButton[])
location: class javax.swing.JPanel
numPad.add(calcButton);
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.*;
import java.text.*;
public class CreateButtonArray extends JFrame{
     public static void main(String[] args){     
          CreateButtonArray calcPad = new CreateButtonArray();
          calcPad.setVisible(true);
     public CreateButtonArray(){
          super("Calculator");
               setSize(200, 300);
               setResizable(false);
               setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               setLayout(new BorderLayout());
               JPanel numPad = new JPanel();
               numPad.setLayout(new GridLayout(4, 4, 5, 5));               
               String[] buttons = { 
                   "7", "8", "9", "/",
               "4", "5", "6", "*",
               "1", "2", "3", "-",
               "0", "CE", "C", "+"
               add(numPad);
               JButton [] calcButton = new JButton[buttons.length];
                    for(int i = 0; i < buttons.length; i++){ 
                         JButton b = new JButton(buttons);
                         calcButton[i] = b;                                   
                         numPad.add(calcButton);     //Error is here