画像ファイルの形式を変更する - Qiitaimport java.awt.Color; import java.awt.image.BufferedImage; import java.io.IOException; import javax.imageio.ImageIO; String from = "変換前の画像パス"; String to = "変換後の画像パス"; try { BufferedImage image = ImageIO.read(new File(from)); BufferedImage tmp = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D off = tmp.createGraphics(); off.drawImage(image, 0, 0, Colo
