Identify valid IP addresses and masks and classify statistics

Describe	Please parse the IP address and the corresponding mask for classification. Requirements are categorized according to the A/b/c/d/e class address, and illegal addresses and masks are categorized separately. All IP addresses are classified as A,b,c,d,e five classes Class A address 1.0.0.0~126.255.255.255; Class B address 128.0.0.0~191.255.255.255; Class C address 192.0.0.0~223.255.255.255; Class D address 224.0.0.0~239.255.255.255; Class E Address 240.0.0.0~255.255.255.255 The IP range of the private network is: 10.0.0.0~10.255.255.255 172.16.0.0~172.31.255.255 192.168.0.0~192.168.255.255 The subnet mask is contiguous 1 for the front, and then it's all 0.
Knowledge points	String, loop, find, search, sort, function, pointer, enumeration, bitwise operation, struct, union, file operation, recursive
Run time limit	0M
Memory limit	0
Input	Multi-line string. One IP address and mask per line, separated by ~. Such as: 10.70.44.68~255.254.255.0 1.0.0.1~255.0.0.0 192.168.0.2~255.255.255.0 19..0.~255.255.255.0
Output	Statistics A, B, C, D, E, error IP address or error mask, the number of private IP, separated by a space, according to the above IP, you can get: 1.0.0.1~255.0.0.0----Class A 192.168.0.2~255.255.255.0----Class C, private 10.70.44.68~255.254.255.0----the wrong mask 19..0.~255.255.255.0-----The wrong IP Statistics can be obtained as follows: 1 0 1 0 0 2 1
Sample input	10.70.44.68~255.254.255.0 1.0.0.1~255.0.0.0 192.168.0.2~255.255.255.0 19..0.~255.255.255.0
Sample output	1 0 1 0 0 2 1

Package Com.oj;import Java.util.scanner;public class Testoj {private static Boolean judge (Int[] mask) {StringBuilder Masks = new StringBuilder (); for (int i = 0;i < mask.length; i++) masks.append (integer.tobinarystring (Mask[i]));// System.out.println (Masks.tostring ()); String str = new String (masks.tostring ()), for (int i = 0;i < Str.length ()-1; i++) if (Str.charat (i) = = ' 0 ' && Str.charat (i+1) = = ' 1 ') return False;return true;} public static void Main (string[] args) {int CountA = 0,COUNTB = 0,COUNTC = 0,countd = 0,counte = 0,counterror = 0,countpri vate = 0; Scanner in = new Scanner (system.in), while (In.hasnext ()) {String str = in.nextline (); string[] data = Str.split ("~"); String IP = data[0]; String mask = data[1]; string[] ips = ip.split ("\ \"); string[] Masks = mask.split ("\ \"); if (ips.length!=4&&masks.length!=4) {counterror++;//system.out.println ("Error"); continue;} Boolean flag = false;int[] Iips = new Int[4];for (int i = 0;i < 4; i++) {Try{iips[i] = Integer.parseint (ips[i]); if (iips[i ]&LT;0&AMP;&AMP;IIPS[I]&GT;255) flag = true;} catch (NumberFormatException e) {flag = True;break;}} if (flag) {counterror++;//system.out.println ("Error"); continue;} Flag = False;int [] imasks = new Int[4];for (int i = 0;i < 4; i++) {Try{imasks[i] = Integer.parseint (masks[i]); if (imasks[ I]&LT;0&AMP;&AMP;IMASKS[I]&GT;255) flag = true;} catch (NumberFormatException e) {flag = True;break;}} if (flag) {counterror++;//system.out.println ("Error"); continue;} if (!judge (imasks)) {counterror++;//system.out.println ("Error"); continue;} if (iips[0]<=126&&iips[0]>=1) {counta++;//system.out.println ("A"); if (iips[0]==10) countPrivate++; Continue;} else if (iips[0]>=128&&iips[0]<=191) {countb++;if (iips[1]>=16&&iips[1]<=31) Countprivate++;//system.out.println ("B"); continue;} else if (iips[0]>=192&&iips[0]<=223) {countc++;if (iips[1]==168) countprivate++;//system.out.println ( "C"); continue;} else if (iips[0]>=224&&iips[0]<=239) {countd++;//system.out.println ("D"); continue;}else if (iips[0]>=240&&iips[0]<=255) {counte++;//system.out.println ("E"); continue;}} System.out.println (counta+ "" +countb+ "" +countc+ "" +countd+ "" +counte+ "" +counterror+ "" +countprivate ";}}

　　

Identify valid IP addresses and masks and classify statistics