递归求解全排列

import java.util.Arrays;

public class Main {

    public static void main(String[] args) {
       char [] data = {'A','B','C'};
       f(data,0);
    }

    private static void f(char [] data,int k){
        if(k == data.length){
            System.out.println(Arrays.toString(data));
        }
        for (int i = k; i < data.length; i++) {
            char temp = data[k];
            data[k]=data[i];
            data[i]=temp;
            f(data,k+1);
            temp=data[k];
            data[k]=data[i];
            data[i]=temp;
        }
    }
}