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½ñÌì¿´Java´úÂëʱ£¬¿´µ½ÁË×Ö·û´®ÓÐÒ»¸ö·½·¨ÊÇstartsWith(String str)µ±Ê±¾õµÃ¼ûÃûÖ®Ò⣬ºÜ¼òµ¥Âð£¬È»ºó¾Í×Ô¼º¶¯ÊÖ×öÁËÒ»ÏÂ,ûÏëµ½·¢ÏÖÁËÒ»¸östartsWith()·½·¨µÄÖØÔØ,startsWith(String str,int Index),µ±Ê±ÉÏÍøÈ¥²éÁËÒ»ÏÂûÓкó±ßÕâ¸ö·½·¨,ÓÚÊÇ×Ô¼º×öÁËһϲâÊÔ,ÏÖÔÚ¸ø³öÈçÏÂÏêϸ½âÊÍ,startsWith(String str)¾ÍÊǼì²éÐββÎÊýÊÇ·ñÓëÄãÒª¼ì²éµÄ×Ö·û´®¿ªÍ·Ïàͬ,¶østartsWith(Sring str,int Index)ÔòÊÇ´ÓÄãÒª±È½ÏµÄÔ­×Ö·û´®µÄÖ¸¶¨Ï±꿪ʼºÍÐβÎ×÷±È½Ï£¬ÕâÀï±ßÄØstr.startsWith(String str)ºÍstr.startsWith(string str,0)ÊÇûÓÐÇø±ðµÄ,ϱ߾Ϳ´´úÂë°É£¡
String st1 = "dsadas";
      System.out.println("st1:"+st1.startsWith("sa",1));
      String st2 = "dsadas";
      System.out.println("st1:"+st2.startsWith("sa"));
      String st3 = "dsadas";
      System.out.println("st2:"+st3.startsWith("ds"));
      String st4 = "dsadas";
      System.out.println("st4:"+st4.startsWith("ds",0));
      String st5 = "dsadas";
      System.out.println("st5:"+st5.startsWith("ds",1));
Êä³ö½á¹ûΪ:
st1:true
st1:false
st2:true
st4:true
st5:false


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