java - 获取一组相同的数字

Question

我正在编写一个代码，该代码将计算有多少个具有相同数字的组。

例如:

11022 = 2 groups with the same number
1100021 = 2 groups with the same number
12123333 = 1 group with the same number

到目前为止，我已经想到了这段代码:

package Numbers;
import java.util.*;

public class Numbers{
    public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int strI ;
    strI = scan.nextInt();
    int[] a = {strI};
    System.out.println(sum(a));
    System.out.println("length = "+a.length);
}

public static in sum(int[] a){
    int sum = 0;
    int last = 0;
    for (int i = 0; i < a.length - 1; i++){
            if(a[i] == a[i + 1] && last != a[i + 1]){
                sum++;
            }
            last = a[i];
        }
        return sum;
    }
}

我的问题是输入的数字将注册为 1 个索引。是否可以输入一系列将进入不同索引的数字？

Answer 1

最简单的方法是将其转换为字符串，这样您就不必处理位值。毕竟，你只关心角色本身。

public static void main(String[] args){
// Get number n... Assuming n has been set to the int in question    

  int n = ...; //Fill in with whatever int you want to test
  String s = n + "";
  char same = ' ';
  int consec = 0;
  for(int i = 0; i < s.length() - 1; i++){
    if(s.charAt(i) == s.charAt(i+1)){
      if(same == ' ')
        consec++;
      same = s.charAt(i);
    }
    else{
      same = ' ';
    }
  }

  System.out.println(consec);
}