Java基础之颜色工具类(超详细注释)
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2022-04-03 18:31:40
颜色工具类(超详细注释)设置属性值自动格式化rgb值和十六进制颜色值。import java.util.hashmap;import java.util.map;public class color{...
颜色工具类(超详细注释)
设置属性值自动格式化rgb值和十六进制颜色值。
import java.util.hashmap; import java.util.map; public class color{ private final string[] hex_letters = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"}; private double alpha;// 透明度(0.0 ~ 1.0) private integer red; // 红色值(0~255) private integer green; // 绿色值(0~255) private integer blue; // 蓝色值(0~255) private string rgb; // rgb值;格式:rgb(red, green, blue) private string rgba; // rgba值;格式:rgb(red, green, blue, alpha) private string hexred; // 十六进制红色值(00-ff) private string hexgreen; // 十六进制绿色值(00-ff) private string hexblue; // 十六进制蓝色值(00-ff) private string hex; // 十六进制颜色值;格式:#hexredhexgreenhexblue /** * 无参构造器 * 默认黑色不透明 */ public color(){ this.red = 0; this.green = 0; this.blue = 0; this.alpha = 1.0; this.hexred = "00"; this.hexgreen = "00"; this.hexblue = "00"; this.rgb = "rgb(0, 0, 0)"; this.rgba = "rgba(0, 0, 0, 1.0)"; this.hex = "#000000"; } /** * 通过rgb三值初始化 * * @param red 红色值(0~255) * @param green 绿色值(0~255) * @param blue 蓝色值(0~255) */ public color(integer red, integer green, integer blue){ // 调用 [通过rgba四值初始化] this(red, green, blue, 1.0); } /** * 通过rgba四值初始化 * * @param red 红色值(0~255) * @param green 绿色值(0~255) * @param blue 蓝色值(0~255) * @param alpha 透明度(0.0 ~ 1.0) */ public color(integer red, integer green, integer blue, double alpha){ // 设置透明度 this.setalpha(alpha); // 设置rgb值 this.setred(red); this.setgreen(green); this.setblue(blue); } /** * 通过颜色字符串初始化 * @param colorstr 颜色字符串;格式为:rgb(red,green,blue) 或 rgba(red,green,blue,alpha) 或 #hexredhexgreenhexblue */ public color(string colorstr){ // 字符串转大写、去空格 colorstr = colorstr.replaceall("\\s*", "").touppercase(); if(colorstr.startswith("#")) { this.alpha = 1.0; this.sethex(colorstr); } else if(colorstr.startswith("rgb(") && colorstr.endswith(")")) { this.alpha = 1.0; this.setrgb(colorstr); }else if (colorstr.startswith("rgba(") && colorstr.endswith(")")) { this.setrgba(colorstr); }else { throw new colorparseexception("color parsing failed, please check color code format. the format is: \"rgb(red,green,blue)\" or \"rgba(red,green,blue,alpha)\" or \"#hexredhexgreenhexblue\"."); } } /** * 获取红色值 * @return 红色值(0~255) */ public integer getred(){ return this.red; } /** * 设置红色值 * @param red 红色值(0~255) */ public void setred(integer red) { // 检查颜色值 if(red < 0 || red > 255) throw new coloroutofrangeexception("red out of range, please set value in 0 ~ 255."); // 设置红色值 this.red = red; // 红色值转十六进制红色值,并设置十六进制红色值 this.hexred = this.normaltohex(red); // 刷新 this.refresh(); } /** * 获取绿色值 * @return 绿色值(0~255) */ public integer getgreen(){ return this.green; } /** * 设置绿色值 * @param green 绿色值(0~255) */ public void setgreen(integer green) { // 检查颜色值 if(green < 0 || green > 255) throw new coloroutofrangeexception("green out of range, please set value in 0 ~ 255."); // 设置绿色值 this.green = green; // 绿色值转十六进制红色值,并设置十六进制绿色值 this.hexgreen = this.normaltohex(green); // 刷新 this.refresh(); } /** * 获取蓝色值 * @return 蓝色值(0~255) */ public integer getblue(){ return this.blue; } /** * 设置蓝色值 * @param blue 蓝色值(0~255) */ public void setblue(integer blue) { // 检查颜色值 if(blue < 0 || blue > 255) throw new coloroutofrangeexception("blue out of range, please set value in 0 ~ 255."); // 设置蓝色值 this.blue = blue; // 绿色值转十六进制红色值,并设置十六进制绿色值 this.hexblue = this.normaltohex(blue); // 刷新 this.refresh(); } /** * 获取十六进制红色值 * @return 十六进制红色值(00-ff) */ public string gethexred(){ return this.hexred; } /** * 设置十六进制红色值 * @param hexred 十六进制红色值(00-ff) */ public void sethexred(string hexred) { // 去空格、转大写 hexred = hexred.replaceall("\\s*", "").touppercase(); // 检查颜色值 checkhexcolorstring(hexred,"hexred"); // 设置十六进制红色值 this.hexred = hexred; // 设置红色值 this.red = hextonormal(hexred); // 刷新 this.refresh(); } /** * 获取十六进制绿色值 * @return 十六进制绿色值(00-ff) */ public string gethexgreen(){ return this.hexgreen; } /** * 设置十六进制绿色值 * @param hexgreen 十六进制绿色值(00-ff) */ public void sethexgreen(string hexgreen) { // 去空格、转大写 hexgreen = hexgreen.replaceall("\\s*", "").touppercase(); // 检查颜色值 checkhexcolorstring(hexgreen,"hexgreen"); // 设置十六进制绿色值 this.hexgreen = hexgreen; // 设置绿色值 this.green = hextonormal(hexgreen); // 刷新 this.refresh(); } /** * 获取十六进制蓝色值 * @return 十六进制蓝色值(00-ff) */ public string gethexblue(){ return this.hexblue; } /** * 设置十六进制蓝色值 * @param hexblue 十六进制蓝色值(00-ff) */ public void sethexblue(string hexblue) { // 去空格、转大写 hexblue = hexblue.replaceall("\\s*", "").touppercase(); // 检查颜色值 checkhexcolorstring(hexblue,"hexblue"); // 设置十六进制蓝色值 this.hexblue = hexblue; // 设置蓝色值 this.blue = hextonormal(hexblue); // 刷新 this.refresh(); } /** * 获取透明度 * @return 透明度(0.0 ~ 1.0) */ public double getalpha(){ return this.alpha; } /** * 设置透明度 * @param alpha 透明度(0.0 ~ 1.0) */ public void setalpha(double alpha) { // 检查透明度 if(alpha < 0 || alpha > 1) throw new coloroutofrangeexception("alpha out of range, please set value in 0.0 ~ 1.0 and keep one decimal place."); // 检查小数点 string[] alphasplit = alpha.tostring().split("\\."); if(alphasplit.length > 1) if(alphasplit[1].length() > 1) throw new coloroutofrangeexception("alpha out of range, please set value in 0.0 ~ 1.0 and keep one decimal place."); // 设置透明度 this.alpha = alpha; // 刷新 this.refresh(); } /** * 获取rgb值 * @return rgb值;格式:rgb(red, green, blue) */ public string getrgb(){ return this.rgb; } /** * 设置rgb值 * @param rgb rgb值;格式:rgb(red, green, blue) */ public void setrgb(string rgb) { // 解析rgb字符串 integer[] rgbarray = parsergb(rgb); // 设置颜色值 this.setred(rgbarray[0]); this.setgreen(rgbarray[1]); this.setblue(rgbarray[2]); // 设置十六进制颜色值 this.sethexred(this.normaltohex(this.getred())); this.sethexgreen(this.normaltohex(this.getgreen())); this.sethexblue(this.normaltohex(this.getblue())); // 刷新 this.refresh(); } /** * 获取rgba值 * @return rgba值;格式:rgba(red, green, blue, alpha) */ public string getrgba(){ return this.rgba; } /** * 设置rgba值 * @param rgba rgba值;格式:rgba(red, green, blue, alpha) */ public void setrgba(string rgba) { // 解析rgb字符串 double[] rgbaarray = parsergba(rgba); // 设置颜色值 this.setred((int)(double)rgbaarray[0]); this.setgreen((int)(double)rgbaarray[1]); this.setblue((int)(double)rgbaarray[2]); this.setalpha(rgbaarray[3]); // 设置十六进制颜色值 this.sethexred(this.normaltohex(this.getred())); this.sethexgreen(this.normaltohex(this.getgreen())); this.sethexblue(this.normaltohex(this.getblue())); // 刷新 this.refresh(); } /** * 获取十六进制颜色值 * @return 十六进制颜色值;格式:#hexredhexgreenhexblue */ public string gethex(){ return this.hex; } /** * 设置hex值 * @param hex 十六进制颜色值;格式:#hexredhexgreenhexblue */ public void sethex(string hex) { // 解析hex字符串 string[] hexarray = parsehex(hex); // 设置十六进制颜色值 this.sethexred(hexarray[0]); this.sethexgreen(hexarray[1]); this.sethexblue(hexarray[2]); // 设置颜色值 this.setred(this.hextonormal(this.gethexred())); this.setgreen(this.hextonormal(this.gethexgreen())); this.setblue(this.hextonormal(this.gethexblue())); // 刷新 this.refresh(); } /** * 解析rgb字符串 * @param rgb rgb值;格式:rgb(red, green, blue) * @return 颜色值数组;0: red; 1: green; 2: blue; */ private integer[] parsergb(string rgb){ // 去空格、转大写 rgb = rgb.replaceall("\\s*", "").touppercase(); // 检查是否为“rgb(”开头、“)”结束 if(rgb.startswith("rgb(") && rgb.endswith(")")) rgb = rgb.substring(4, rgb.length()-1); // rgb字符串数组 通过“,”分割 string[] rgbstrarray = rgb.split(","); // 判断数组长度是否小于1 if(rgbstrarray.length < 1) throw new colorparseexception("rgb parsing failed, please check rgb format. the format is: \"rgb(red,green,blue)\" or \"red,green,blue\"."); // string转int int red = integer.parseint(rgbstrarray[0]); int green = integer.parseint(rgbstrarray[1]); int blue = integer.parseint(rgbstrarray[2]); // 返回rgb颜色数组 return new integer[]{red, green, blue}; } /** * 解析rgba字符串 * @param rgba rgba值;格式:rgba(red, green, blue, alpha) * @return 颜色值数组;0: red; 1: green; 2: blue; 3: alpha; */ private double[] parsergba(string rgba){ // 去空格、转大写 rgba = rgba.replaceall("\\s*", "").touppercase(); // 检查是否为“rgba(”开头、“)”结束 if(rgba.startswith("rgba(") && rgba.endswith(")")) rgba = rgba.substring(5, rgba.length()-1); // rgb字符串数组 通过“,”分割 string[] rgbastrarray = rgba.split(","); // 判断数组长度是否小于1 if(rgbastrarray.length < 1) throw new colorparseexception("rgba parsing failed, please check rgba format. the format is: \"rgba(red,green,blue,alpha)\" or \"red,green,blue,alpha\"."); // string转double double red = double.parsedouble(rgbastrarray[0]); double green = double.parsedouble(rgbastrarray[1]); double blue = double.parsedouble(rgbastrarray[2]); double alpha = double.parsedouble(rgbastrarray[3]); // 返回rgba颜色数组 return new double[]{red, green, blue, alpha}; } /** * 解析hex字符串 * @param hex 十六进制颜色值 * @return 颜色值数组;0: hexred; 1: hexgreen; 2: hexblue; */ private string[] parsehex(string hex){ // 字符串去空格、转大写 hex = hex.replaceall("\\s*", "").touppercase(); // 去起始“#” if(hex.startswith("#")) hex = hex.substring(1); // 声明颜色值 string hexred; string hexgreen; string hexblue; // 检查字符串长度 if(hex.length() == 3){ // 取出颜色值 hexred = hex.substring(0, 1); hexgreen = hex.substring(1, 2); hexblue = hex.substring(2); // 补全hexcolor hexred += hexred; hexgreen += hexgreen; hexblue += hexblue; }else if(hex.length() == 6){ // 取出颜色值 hexred = hex.substring(0, 2); hexgreen = hex.substring(2, 4); hexblue = hex.substring(4); }else{ throw new colorparseexception("hex color parsing failed, please check hex color format. the format is: \"#hexcolor\" or \"hexcolor\", examples: \"#ffffff\" or \"#fff\" or \"ffffff\" or \"fff\"."); } // 返回hex颜色数组 return new string[]{hexred, hexgreen, hexblue}; } /** * 生成rgb值 * @return rgb值;格式:rgb(red, green, blue) */ private synchronized string generatergb(){ // 准备结果 string result = "rgb("; // 添加红色值 result += this.getred(); result += ", "; // 添加绿色值 result += this.getgreen(); result += ", "; // 添加蓝色值 result += this.getblue(); result += ")"; // 返回结果 return result; } /** * 生成rgba值 * @return rgba值;格式:rgb(red, green, blue, alpha) */ private synchronized string generatergba(){ // 准备结果 string result = "rgba("; // 添加红色值 result += this.getred(); result += ", "; // 添加绿色值 result += this.getgreen(); result += ", "; // 添加蓝色值 result += this.getblue(); result += ", "; // 添加透明度 result += this.getalpha(); result += ", "; // 返回结果 return result; } /** * 生成十六进制值 * @return 十六进制值;格式:#hexredhexgreenhexblue */ private synchronized string generatehex(){ // 准备结果 string result = "#"; // 添加红色值 result += this.gethexred(); // 添加绿色值 result += this.gethexgreen(); // 添加蓝色值 result += this.gethexblue(); // 返回结果 return result; } /** * 十进制转十六进制 * @param number 十进制数 * @return 十六进制字符串 */ private string normaltohex(integer number){ // 十进制转十六进制 string hexnumber = integer.tohexstring(number).touppercase(); // 检查十六进制字符串长度 if(hexnumber.length() == 1) // 一位 hexnumber = 0 + hexnumber; // 前位+0 // 返回十六进制字符串 return hexnumber; } /** * 十六进制转十进制 * @param hexstr 十六进制字符串 * @return 十进制数 */ private integer hextonormal(string hexstr) { // 去空格转大写 hexstr = hexstr.replaceall("\\s*", ""); // 准备结果 int result = 0; // 十六进制字母集合 map<string, integer> hexlettersmap = new hashmap<>(); // 十六进制字符填充至集合 for (int i = 0; i < hex_letters.length; i++) { hexlettersmap.put(hex_letters[i], i); } // 将十六进制字符串转为数组 string[] hexstrarray = new string[hexstr.length()]; for(int i = 0; i < hexstrarray.length; i++){ hexstrarray[i] = hexstr.substring(i, i+1); } // 转十进制数 for(int i = 0; i < hexstrarray.length; i++){ result += hexlettersmap.get(hexstrarray[i]) * math.pow(16, hexstrarray.length - 1 - i); } // 返回结果 return result; } /** * 检查十六进制颜色字符串(两位:00~ff) * @param hexstr 十六进制字符串(00~ff) * @param errorfieldname 发生错误的字段名 */ private void checkhexcolorstring(string hexstr, string errorfieldname){ // 去空格,转大写 hexstr = hexstr.replaceall("\\s*", "").touppercase(); // 截取字符 string firstletter; string secondletter; // 检查格式 if(hexstr.length() == 1){ firstletter = secondletter = hexstr; }else if(hexstr.length() == 2){ firstletter = hexstr.substring(0,1); secondletter = hexstr.substring(1); }else{ throw new coloroutofrangeexception(errorfieldname + " out of range, please set value in 00 ~ ff."); } // 字符正确标识 boolean firstright = false; boolean secondright = false; // 检查第一个字符 for (string letter : hex_letters) { if(letter.equals(firstletter)){ firstright = true; break; } } // 检查第二个字符 for (string letter : hex_letters) { if(letter.equals(secondletter)){ secondright = true; break; } } // 判断是否全部正确 if(!firstright || !secondright) throw new coloroutofrangeexception(errorfieldname + " out of range, please set value in 00 ~ ff."); } /** * 刷新 */ private void refresh(){ // 生成并设置rgb值 this.rgb = this.generatergb(); // 生成并设置rgba值 this.rgba = this.generatergba(); // 生成并设置十六进制颜色值 this.hex = this.generatehex(); } /** * 对象转字符串 * @return 字符串 */ public string tostring(){ return "color: {" + "\n\tred: " + this.getred() + ",\n\tgreen: " + this.getgreen() + ",\n\tblue: " + this.getblue() + ",\n\talpha: " + this.getalpha() + ",\n\trgb: " + this.getrgb() + ",\n\trgba: " + this.getrgba() + ",\n\thexred: " + this.gethexred() + ",\n\thexgreen: " + this.gethexgreen() + ",\n\thexblue: " + this.gethexblue() + ",\n\thex: " + this.gethex() + "\n}"; } /** * 颜色超出范围异常 */ public static class coloroutofrangeexception extends runtimeexception{ public coloroutofrangeexception(string message) { super(message); } } /** * 颜色解析异常 */ public static class colorparseexception extends runtimeexception{ public colorparseexception(string message) { super(message); } } }
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