Question

如何将str = 1a2a3a4'转换成

Answer 1

public static void main(String[] args)
{
String str ="1234567";
char[] array = str.toCharArray();//将字符串转换为字符数组
int size = array.length;
for(int i = 0; i < size; i++)
{
if(i == (size -1)) //如果到了最后一位，不增加","
{
System.out.print(array[i]);
break; //已经到最后一个字符，退出循环
}
System.out.print(array[i] + ",");
}
}