Advanced Programming-Week17

Summary

1. 命令行参数

Task 85

import java.util.*;

public class Task85{
    public static void main(String[] args){
        if(args.length == 0){
        ;
        }else{
            String temp="";
            ArrayList<String>  sentence=new ArrayList<String>();
            for(int i=0;i<args.length;i++)
            {
                temp+=args[i]+" ";
                if(args[i].endsWith("."))
                {
                    sentence.add(temp);
                    temp="";
                }
            }
            for(int i=0;i<sentence.size();i++)
            {
                temp=sentence.get(i);
                if(i%2==0)
                {
                    char []temp2=temp.toCharArray();
                    for(int j=0;j<temp2.length-1;j++)
                    {
                        if(temp2[j]!=' ')
                        {
                            if(temp2[j]<='z'&&temp2[j]>='a')
                            {
                                temp2[j]+=2;
                                if(temp2[j]>'z')
                                {
                                    temp2[j]-=26;
                                }
                            }else if(temp2[j]<='Z'&&temp2[j]>='A')
                            {
                                temp2[j]+=2;
                                if(temp2[j]>'Z')
                                {
                                    temp2[j]-=26;
                                }
                            }
                        }
                        System.out.print(temp2[j]);
                    }
                }else{
                    temp=temp.substring(0,temp.length()-2);
                    temp=new StringBuffer(temp).reverse().toString();
                    System.out.print(" "+temp+". ");
                }
            }
        }
    }
}

Task 87

import java.util.*;
import java.util.regex.*;

public class Task87 {
    public static void main(String[] args)
    {
        String s;
        Scanner in= new Scanner(System.in);
        s=in.nextLine();
        in.close();
        String regex1="[a-zA-Z]";
        String regex2="[0-9]";
        int len=s.length();
        int countWords=0;
        int countNum=0;
        Pattern pattern1=Pattern.compile(regex1);
        Matcher matcher1=pattern1.matcher(s);

        while(matcher1.find())
        {
            countWords++;
        }        
        Pattern pattern2=Pattern.compile(regex2);
        Matcher matcher2=pattern2.matcher(s);

        while(matcher2.find())
        {
            countNum++;
        }

        int countOther=len-countNum-countWords;

        System.out.println("The alphabetic is "+countWords+", and he probability is "+((double)countWords/len));
        System.out.println("The number is "+countNum+", and he probability is "+((double)countNum/len));
        System.out.println("The other is "+countOther+", and he probability is "+((double)countOther/len));
    }
}

Task 92

import java.util.*;

public class Task92
{

    public static Boolean check1(String s)
    {
        int l=0,r=s.length()-1;
        while(l<r)
        {
            if(s.charAt(l)==s.charAt(r))
            {
                l++;
                r--;
            }else break;
        }
        if(l>=r)
        {
            return true;
        }else return false;
    }    
    public static Boolean check2(String s[])
    {
        int l=1,r=s.length-1;
        while(l<r)
        {
            if(s[l].equals(s[r]))
            {
                l++;
                r--;
            }else break;
        }
        if(l>=r) return true;
        else return false;
    }
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        String str=in.nextLine();
        String str1=str.replaceAll("[^a-zA-Z]","").toLowerCase();
        String str2[]=str.replaceAll("[^a-zA-Z ]","").toLowerCase().split(" ");

        if(check1(str1)||check2(str2))
        {
            System.out.println("The sentence you enter is a palindrome.");
        }else{
            System.out.println("The sentence you enter is not a palindrome.");
        }
        in.close();
    }
}