Question

Create a Java program that analyzes a program and produces the output into another file. The program must retrieve the path to the .java file. Once the path to the file is found the program must figure out the length of the longest line is in the program. For example, working with a program called MainFile.java. Once it figures out the longest line in the code it will put the output into MainFile.java.stats and it will be located in the same directory. It doesn't matter what the contents of the .java file is as long as the output is correct in the .java.stats file. You can use your own .java files and folders to figure this program out. You must use List<String> lines = Files.readAllLines(filePath, Charset.defaultCharset()); iterate through the list of strings. And you must use void writeToFile( Path location, List<String> toWrite ){ Files.write(location,toWrite,Charset.defaultCharset()); } to create the output text which will be MainFile.java.stats. Please use both of the bolded code exactly how it is to figure out this program. There is another solution on the website; however, it is not what I was looking for.

Answer 1

Answer:---- Date:18/09/2018

import java.util.*;

import java.io.*;

import java.nio.charset.Charset;

import java.nio.file.*;

public class LongestFile {

public static void main(String[] args) throws IOException {

String dir = "/home/foo/";

List<String> longest = new ArrayList<>();

String fileName="";

File folder = new File(dir);

File files[] = folder.listFiles();

String longest_file_path="";

for(int i=0;i<files.length;i++) {

if(!files[i].isFile())continue;

String fpath = files[i].getAbsolutePath();

if(fpath.endsWith(".java")||fpath.endsWith(".txt")) {

Path filepath = Paths.get(fpath);

try {

List<String> lines = Files.readAllLines(filepath,Charset.defaultCharset());

if(lines.size()>longest.size()) {

longest=lines;

longest_file_path = fpath+".stats";

fileName = files[i].getName();

}

} catch (IOException e) {

System.out.println("error in reading file "+files[i].getName());

}

}

}

System.out.println("longest file found in "+dir+" is : "+fileName);

System.out.println("writting to file......");

writeToFile(Paths.get(longest_file_path), longest);

System.out.println("\n\nOutput written to "+longest_file_path);

}

public static void writeToFile(Path location, List<String> toWrite) {

try {

Files.write(location, toWrite, Charset.defaultCharset());

} catch (IOException e) {

System.out.println(e.getMessage());

}

}

}

COMPILE & EXECUTE PASTE SOURCE Successfully compiled /tmp/java-wVTQxh/LongestFile . java <-main method