Java 示例 删除一个字符

public class Main {

   public static void main(String args[]) {



      String str = "this is Java";

      System.out.println(removeCharAt(str, 3));

   }

   public static String removeCharAt(String s, int pos) {

      return s.substring(0, pos) + s.substring(pos + 1);

   }

}