2回答

• 

  阳光下的空气

  2015-12-05 21:53:57

  string index out

  检查下你的变量i的取值范围是否超出字符串length

  btw，when you ask questions pls show all the codes 

  0 0
• 

  小刀阿多

  2015-04-30 17:20:01

  int num = 0;

  String string = "aabcdefgasshhrhaggggjdca";

  for(int i = 0;i<string.length(); i++){

  if(string.charAt(i)=='a'){

  num++;

  }

  }

  System.out.println(num);

  
  

  0 0