import java.util.Collections; import java.util.Map; import java.util.TreeMap; public class TestStringSplict { public static void main(String[] args){ String str = "aaaaaaaccccccccccccccccccccccaaaabb"; // 用map实现 // TreeMap<Character,Integer> map = new TreeMap<Character,Integer>(); // for(Character ch : str.toCharArray()){ // if((ch>='a' && ch<'z')||(ch>'A' && ch<'Z')){ // Integer count = map.get(ch); // map.put(ch, null==count?1:count+1); // } // } // // System.out.println(Collections.max(map.values())); //用普通数组实现 int[] aa = new int[60]; for(char temp:str.toCharArray()){ if((temp>=65 && temp<=90)||(temp>=97 && temp<=122)){ temp -= 65; aa[temp]++; } } int max = aa[0]; int position = 0; for(int i=0;i<aa.length;i++){ if(aa[i]>max){ max = aa[i]; position = i; } } System.out.println(max); System.out.println("字母"+(char)(position+65) + "出现" + max + "次"); } }