Buttons are not being place where I tell them

So I was trying to place 10 buttons in a grid at the bottom of my frame (without using a layout manager) and for some reason I cannot figure out why this isn't working, I was wondering if anyone could help.

I should probably explain the code:

Basically I have just created a loop that stores a "while" in it, this while is repeated 3 times before ending and going back to the loop. After the while is finished, the Y changes by 85 to start a new layer for the next 3 buttons. The loop repeats 4 times to create 4 different layers of 10 buttons.

Thanks!

Main

public class Main {

	private static JFrame frame = new JFrame();
	private static JPanel panel = new JPanel();
	
	public static void main(String[] args) {
		Buttons.setButtons(frame, panel);
		Window.setFrame(frame, panel);
	}

}

Buttons

public class Buttons {
	
	private static JButton b0, b1, b2, b3, b4, b5, b6, b7, b8, b9;
	private static JButton equals;
	private static JButton minus;
	private static JButton plus; 
	private static int i = 0;
	private static int x = 10;
	private static int y = 140;
	
	private static JButton buttons[] = {b0, b1, b2, b3, b4, b5, b6, b7, b8, b9};
	
	public static void setButtons(JFrame frame, JPanel panel) {
		
		for (int b = 0; b < 4; b++) {
			while (i < 3) {
			    buttons[i] = new JButton(Integer.toString(i)); 
			    buttons[i].setBounds(x, y, 80, 80);
			    x = x + 85; 
			    buttons[i].setFocusable(false);
			    buttons[i].setBackground(Color.GRAY);
			    panel.add(buttons[i]);
			    i++;
			}
			y = y + 85; 
			x = 10;
		}
		
		System.out.print(y);
		frame.setVisible(true); 
	}
	
}

Window

public class Window {

	public static void setFrame(JFrame frame, JPanel panel) {
		
		frame.setSize(370, 525);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setResizable(false);
		
		panel.setBounds(10, 140, 200, 200);
		panel.setBackground(Color.DARK_GRAY); 
		frame.add(panel); 
	}
}

Thanks this works, and solved one of my problems. The other problem was that the "while" did not work after the second loop so I had to rewrite the loop system, here is the solution just in case you want to use it (don't use this, I'm a noob. Also don't be like me, use a layout manager.):

public class Buttons {
private static JButton b0, b1, b2, b3, b4, b5, b6, b7, b8, b9;
private static JButton dot;
private static JButton equals;
private static JButton minus;
private static JButton plus;
private static int count = 9;
private static int x = 10;
private static int y = 145;
private static JButton buttons[] = {b0, b1, b2, b3, b4, b5, b6, b7, b8, b9};
public static void setButtons(JFrame frame, JPanel panel) {
for (int b = 3; b > 0; b--) {
for (int i = 3; i > 0 ; i--) {
buttons[count] = new JButton(Integer.toString(count)); 
buttons[count].setBounds(x, y, 80, 80);
x = x + 85; 
buttons[count].setFocusable(false);
buttons[count].setBackground(Color.GRAY);
panel.add(buttons[count]);
count--;
}
y = y + 85; 
x = 10;
}
dot = new JButton(".");
dot.setBounds(x, y, 80, 80);
dot.setFocusable(false);
dot.setBackground(new Color(0, 200, 150));
panel.add(dot);
buttons[0] = new JButton("0");
x = x + 85;
buttons[0].setBounds(x, y, 80, 80);
buttons[0].setFocusable(false);
buttons[0].setBackground(Color.GRAY);
panel.add(buttons[0]);
plus = new JButton("+");
x = x + 85; 
plus.setBounds(x, y, 80, 80); 
plus.setFocusable(false);
plus.setBackground(new Color(0, 200, 150));
panel.add(plus);
minus = new JButton("-");
x = x + 85;
minus.setBounds(x, y, 80, 80);
minus.setFocusable(false);
minus.setBackground(new Color(0, 200, 150));
panel.add(minus); 
equals = new JButton("=");
y = 145;
equals.setBounds(x, y, 80, 250);
equals.setFocusable(false);
equals.setBackground(new Color(240, 150, 50));
panel.add(equals); 
frame.setVisible(true); 
}

}

Maybe you think you're working without a layout manager because you haven't called setLayout on your JFrame, but in fact the JFrame gave itself a BorderLayout by default.

If you truly want to work without a layout manager, add the line

frame.setLayout(null);

in your setup code.