识别有效的IP地址和掩码并进行分类统计

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,countPrivate = 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]<0&&iips[i]>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]<0&&imasks[i]>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);
	}
}