Java 데이터베이스 학습 경로 공유

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.color.ColorSpace;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public static byte[]
 toByteArray(int number){
  int temp
 = number;
  byte[]
 b=new byte[4];
  for (int i
 = b.length - 1;
 i > -1;
 i--)
  {
     b[i]
 = new Integer(temp
 & 0xff).byteValue();
     temp
 = temp >> 8;
  }
  return b;
}