在您的答案稍加改动，可以看一下 public String PrintMinNumber(int [] numbers) {         ArrayList<String> arrayList = new ArrayList<String>();         for(int i : numbers){             arrayList.add( i + "" );         }         Collections.sort(arrayList, new Comparator<String>() {                          public int compare(String o1, String o2) {                 int i = 0, j = 0;                 while(i < o1.length() && j < o2.length()){                     if(o1.charAt(i) < o2.charAt(j)){                         return -1;                     }else if(o1.charAt(i) > o2.charAt(j)){                         return 1;                     }                     i++; j++;                 }                 while(i < o1.length()){//2到达了终点                     if(j==o2.length()) j-=o2.length();                     if(o1.charAt(i) < o2.charAt(j)){                         return -1;                     }else if(o1.charAt(i) > o2.charAt(j)){                         return 1;                     }                     i++;j++;                 }                 while(j < o2.length()){                     if(i==o1.length()) i-=o1.length();                     if(o1.charAt(i) < o2.charAt(j)){                         return -1;                     }else if(o1.charAt(i) > o2.charAt(j)){                         return 1;                     }                     i++;j++;                 }                 return 0;             }         });         StringBuilder stringBuilder2 = new StringBuilder();         for(String s : arrayList){             stringBuilder2.append(s);         }         return stringBuilder2.toString();     } }