is it possible to do a loop based on a if statment?

**ok so im trying to have my code loop if the user clicks no after entering their input ** `import java.awt.event.WindowAdapter; import javax.swing.JFrame; import javax.swing.JOptionPane;

public class Sizer extends WindowAdapter 
{
        public static void main (String[]args){


        JFrame m = new JFrame();
        JOptionPane.showMessageDialog(m,"Ok To set the window size you are going to type in the number for each value REMEMBER THE SIZE IS IN PIXELS");


        String input1= JOptionPane.showInputDialog("Height (suggested under 1080 and above 300)");
        int Height= Integer.parseInt( input1);

after this input i have it set to confirm if this user entered it in correctly if they click yes it keeps going if they click no it exits i want it to have the user type it in again how would i do this

        int a1 = JOptionPane.showConfirmDialog(m,"Are you sure that this is the correct Height"+ Height);
        if (a1==JOptionPane.YES_OPTION){
        if (a1==JOptionPane.NO_OPTION){

        }

        String input2= JOptionPane.showInputDialog("Width (suggested under 1920 and above 300)");
        int Width = Integer.parseInt( input2);




        JFrame frame = new JFrame();                    
        Slop comp = new Slop();
        frame.add(comp);
        frame.setSize(Height,Width);
        frame.setTitle("Slop of a Line");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
                }   
        }
}           

`