Java

Hi

I have a directory where log txt files are logged. Each log file has the following title date format 20180114.log, which is yyymmdd.

I want to search for data in the preceding file (date) so if the current date file is 20180114.log, I want to search the previous day 20180113.log, and then output the data i search for in anther text file.


How do I achieve this in java? any code examples I can follow?

I made a start by displaying the list of the files in the directory but could do with some help to achieve the above

public static void main(String[] args) {
File currentDir = new File("\\\\directory Path"); // current directory
displayDirectoryContents(currentDir);
}

public static void displayDirectoryContents(File dir) {
try {
File[] files = dir.listFiles();
for (File file : files) {

System.out.println(" file:" + file.getCanonicalPath());
}

} catch (IOException e) {
e.printStackTrace();
}
}


thanks in advance

class facto
{
	public static void main(String args[])
	{
		System.out.println(dust(5));		
	}

	static int dust(int z)
	{
		if (z==1||z==2)
		{
			return 2;
		}

		else
		{	
			return dust(z-1) * dust(z-2);	
		} 

	}
}

I have a code for Java in which I am creating 2 Array List from 2 dimensional array.. But I am getting an Array Out Of Bound exception.. I am passing 2 dimensional array to my class method answer.. But it is not working..

    import java.io.*;
    import java.util.*;
    
    public class Abc {
        static void answer(Integer[][] a,int l){
            Integer[] un = new Integer[l];
            Integer[] un1 = new Integer[l];
            final Integer z = 0;
            int max1=0,max2=0,count1=0,count2=0; 
            int ind=0;
            ArrayList<integer> arr1 = new ArrayList<integer>(Arrays.asList(a[0][l]));
            ArrayList<integer> arr2 = new ArrayList<integer>(Arrays.asList(a[1][l]));

            for(int i=0;i<l;i++){
 if(i="" %="" 2="=" 0){
="" max1="Collections.max(arr1);
" count1="" +="max1;
" ind="arr1.indexOf(max1);
" arr1.set(ind,z);
="" arr2.set(ind,z);
="" }
="" else{
="" max2="Collections.max(arr2);" 
="" count2="" arr2.set(ind,0);
="" arr1.set(ind,0);
="" }

="" if(count1="" <="" count2){
="" system.out.println("second");
=""> count2){
                    System.out.println("First");
                }
                else{
                    System.out.println("Tie");
                }

            }

        }
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);        
            int times = sc.nextInt();
            for(int i=0;i