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把數組變換成字符串

== for 字符 i++ 字符串 else system out temp

  int[] arr = {1,2,3};

  for(int i=0;i<arr.length();i++){

    String temp = "[";

    if(temp==arr.length()-1){

    temp = temp+arr[i]+"]"    

    }else{

    temp = temp+arr[i]+", "     

    }

    //如果將上面的判斷換成正則表達式的話

    //temp = temp+((i==arr.length()?arr[i]+"]":arr[i]+", "));  

  }

  System.oout.println(temp);

把數組變換成字符串