Open and save

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;



/**
 *
 * @author FRANCISCO MINAJAS
 */
public class Abrir_Guardar {


    public static File input;
    public static String ruta;

    public void Imageelegida(Graphics g){
        ImageIcon dibujo = new ImageIcon(new ImageIcon(getClass().getResource("/imagenes/1.jpeg")).getImage());
        //ImageIcon dibujo = new ImageIcon(new ImageIcon(getClass().getResource(ruta)).getImage());
        //g.drawImage(dibujo.getImage(), 0, 0, 30, 31,null);
        g.drawImage(dibujo.getImage(), 0, 0, 360, 361,null);
    }

     public void GuardarIma(BufferedImage bi){
        JFileChooser fc = new JFileChooser();
        fc.addChoosableFileFilter(new FileNameExtensionFilter("todos  archivos *.png", "png", "PNG"));
        int elegido = fc.showSaveDialog(null);

        try{
            if(elegido == JFileChooser.APPROVE_OPTION){
                File output = fc.getSelectedFile();
                String ubicacion = output.getAbsolutePath();
                ImageIO.write(bi, "png", new File(ubicacion));

                if(!(ubicacion.endsWith(".png"))){
                    File g = new File(ubicacion+".png");
                    output.renameTo(g);
                    System.out.println(output.getAbsolutePath());
                }
            }
        }catch(Exception e){
            System.out.println("no se guardo");
        }
    }
}