Java中Color和16进制字符串互相转换的方法-创新互联

1.原理

主要是调用了toHexString（将int类型转为16进制字符串）、parseInt（将字符串解析为int）这两个方法。

2.代码

public static void main(String[] args) {
  String hexString = colorToHexValue(Color.RED);
  System.out.println("16进制字符串:" + hexString);
  Color color = fromStrToARGB(hexString);
  System.out.println("16进制字符串转为颜色的ARGB值:("+String.valueOf(color.getAlpha())+","+String.valueOf(color.getRed())+","
  +String.valueOf(color.getGreen())+","+String.valueOf(color.getBlue())+")");
 }

 private static String colorToHexValue(Color color) {
  return intToHexValue(color.getAlpha()) + intToHexValue(color.getRed()) + intToHexValue(color.getGreen()) + intToHexValue(color.getBlue());
 }

 private static String intToHexValue(int number) {
  String result = Integer.toHexString(number & 0xff);
  while (result.length() < 2) {
   result = "0" + result;
  }
  return result.toUpperCase();
 }

 private static Color fromStrToARGB(String str) {
  String str1 = str.substring(0, 2);
  String str2 = str.substring(2, 4);
  String str3 = str.substring(4, 6);
  String str4 = str.substring(6, 8);
  int alpha = Integer.parseInt(str1, 16);
  int red = Integer.parseInt(str2, 16);
  int green = Integer.parseInt(str3, 16);
  int blue = Integer.parseInt(str4, 16);
  Color color = new Color(red, green, blue, alpha);
  return color;
 }