By connecting the elements in the integer array with the plus sign, the string
1 and an array atint[] are finally generated. at? =? new? int[2]; //define an integer array of length 2
2. Splice elements into a string strString? str? =? "";
for(int? i=; i< at.length; i++){ str? =? str? +? at[i]; //spliced into a string, and finally put it in the variable str
}