net与java常用代码写法对比.docxVIP

.Net与Java常用代码写法对比语法相关StringBuilder.Net写法：StringBuilder sb = newStringBuilder();sb.Append(value);sb.AppendLine(value);sb.AppendFormat(format, args);sb.ToString();Java写法：StringBuilder sb=new StringBuilder();sb.append(value);sb.toString();备注：类型转换string、int、DateTime.Net写法：Convert.ToString(object)object.ToString()Convert.ToInt32(object)int.TryParse(string,out result)Convert.ToDateTime(object)DateTime.TryParse(string,out result)DateTime.ToString(format)Java写法：Object.toString();Integer.parseInt(object);DateFormat fmt =newSimpleDateFormat(yyyy-MM-dd); String s = 1987-10-10;Date date = fmt.parse(s);String dateStr = newSimpleDateFormat(yyyy-MM-dd hh:mm:ss).format(date);备注：C#中有as的写法，但在java中没有只能用强转换Enum枚举.Net写法：定义：publicenumAuditStatus {编辑中 = 1,//会员网上登记，未提交待审核 = 2, //会员网上提交后由中心人员进行流程审核审核通过 = 3, //审核流程结束审核不通过 = 4, //回到会员处继续处理删除 = 5, //删掉作废 = 6 }AuditStatus AuditStatus = EpointBid_Constant.Enums.ClsEnum.AuditStatus.编辑中;转换：AuditStatus = (AuditStatus)Enum.Parse(typeof(AuditStatus),value);遍历：foreach (int i inEnum.GetValues(typeof(AuditStatus)))Java写法：publicclassTestEnum {/** * 普通枚举 */publicenum ColorEnum {red, green, yellow, blue; }/** * 枚举像普通的类一样可以添加属性和方法，可以为它添加静态和非静态的属性或方法 */publicenum SeasonEnum {//注：枚举写在最前面，否则编译出错spring, summer, autumn, winter;privatefinalstatic String position = test;publicstatic SeasonEnum getSeason() {if (test.equals(position))returnspring;elsereturnwinter; } }}//遍历枚举for(ColorEnum color : ColorEnum.values()){ System.out.println(color);}备注：string操作.Net写法：判断是否为空：string.IsNullOrEmpty判断是否包含某个字符：string.Contains(value)格式化字符串：string.Format(format,args)检索：x.IndexOf(value); x.IndexOf(value,startIndex); x.LastIndexOf(value); x.LastIndexOf(value, startIndex);替换：x.Replace(oldValue,newValue)删除字符：x.Remove(startIndex);x.Remove(startIndex,count);截取：x.Substring(startIndex); x.Substring(startIndex, length);移除字符：x.Trim();x.Trim(trimChars); x.TrimStart(trimChars); x.TrimEnd(trimChars);大小写转换：x.ToUpper();