Changing a certian color to another color

Question

how can i be done

Answer 1

//If you DON't know actual color of image
    public static BufferedImage getBIrecoloreada(BufferedImage bi, Color nuevoColor) {
        int w = bi.getWidth();
        int h = bi.getHeight();
        int pixel;       
        int codColor = nuevoColor.getRGB();
        BufferedImage biNueva = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
        for (int x = 0; x < w; x++) {
            for (int y = 0; y < h; y++) {
                pixel = bi.getRGB(x, y);
                if ((pixel & 0xff000000) != 0x00) {
                    // Si no es un pixel transparente (16777215)
                    biNueva.setRGB(x, y, codColor);
        return biNueva;
     //If you know actual color of image
    public static BufferedImage getBIrecoloreada(BufferedImage bi, Color colorActual, Color colorNuevo) {
         int w = bi.getWidth();
         int h = bi.getHeight();
         int pixel;       
         int codColorNuevo = colorNuevo.getRGB();
         int codColorActual = colorActual.getRGB();
         int diferencia = codColorNuevo - codColorActual;
        BufferedImage biNueva = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
         for (int x = 0; x < w; x++) {
             for (int y = 0; y < h; y++) {
                 pixel = bi.getRGB(x, y);
                 if ((pixel & 0xff000000) != 0x00) {
                     // Si no es un pixel transparente (-16777215)
                      biNueva.setRGB(x, y, pixel + diferencia);
         return biNueva;
     }