//      //  NSString+NSStringForJava.m      //  NSStringCategory      //      //  Created by Ryan Tang on 12-10-17.      //  Copyright (c) 2012年 Ericsson Labs. All rights reserved.      //            #import "NSString+NSStringForJava.h"            @implementation NSString (NSStringForJava)            //对比两个字符串内容是否一致      - (BOOL) equals:(NSString*) string      {          return [self isEqualToString:string];      }            //判断字符串是否以指定的前缀开头      - (BOOL) startsWith:(NSString*)prefix      {          return [self hasPrefix:prefix];      }            //判断字符串是否以指定的后缀结束      - (BOOL) endsWith:(NSString*)suffix      {          return [self hasSuffix:suffix];      }            //转换成小写      - (NSString *) toLowerCase      {          return [self lowercaseString];      }            //转换成大写      - (NSString *) toUpperCase      {          return [self uppercaseString];      }            //截取字符串前后空格      - (NSString *) trim      {          return [self stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];      }            //用指定分隔符将字符串分割成数组      - (NSArray *) split:(NSString*) separator      {          return [self componentsSeparatedByString:separator];      }            //用指定字符串替换原字符串      - (NSString *) replaceAll:(NSString*)oldStr with:(NSString*)newStr      {          return [self stringByReplacingOccurrencesOfString:oldStr withString:newStr];      }            //从指定的开始位置和结束位置开始截取字符串      - (NSString *) substringFromIndex:(int)begin toIndex:(int)end      {          if (end <= begin) {              return @"";          }          NSRange range = NSMakeRange(begin, end - begin);          return [self substringWithRange:range];      }            @end