//字符串中找最大数字class Untitled {public static void main(String[] args) {String str = "abc123de4567ff";char[] cs = str.toCharArray(); int count = 0;int max = 0;int end = 0;for(int i = 0; i if(Character.isDigit(cs[i])){count++;}else{if(count > max){max = count;end = i;}count = 0;}}String s1 = str.substring(end-max, end);System.out.println(s1);}}