For any given file, Write a Java program to find a line with maximum number of words in it is a very common interview question. In other words, write a Java program to find longest line from file.
In this tutorial we will go over all detailed steps to programatically figure out longest line.
Here is complete logic:
- Read provided file using Java8
Stream.forEach()loop. - Each line will be pass to
analyseLines()method in which we will find total word count and update two variable if it’s longest line by comparing previously added valuelineCountrepresents a line with maximum word countcrunchifyMaxWordsholds a value of total words
- In below Java program we will read file
FindLongestLineFromFile.txtlocated under Documents folder. Please update file and location as per your system setup. - print() and println() are the simple print Utilities.
- Once reading complete file – we are printing result.
If you are interested in more file reading, working with lines and total number words then try to explore below articles:
- Read File, Count total number of Characters, Words & Lines
- Find Maximum Occurrence of Words from Text File
- Count Number of XML Elements in Java
How do I split a string with any whitespace chars as delimiters?
- Simple way is to split a string in java using
\\s+delimiter.
CrunchifyFindLineWithMaxWordCount.java
package crunchify.com.tutorial;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Stream;
/**
*
* @author Crunchify.com
* Program: From provided file, find a line which has maximum number of words in it
* Version: 1.0.3
*
*/
public class CrunchifyFindLineWithMaxWordCount {
private int crunchifyMaxWords = 0;
private List<String> lineCount = new ArrayList<String>();
public int getCurrentMaxCount() {
return crunchifyMaxWords;
}
public void setCurrentMaxCount(int crunchifyMaxWords) {
this.crunchifyMaxWords = crunchifyMaxWords;
}
public List<String> getLines() {
return lineCount;
}
public void setLines(List<String> lineCount) {
this.lineCount = lineCount;
}
public static void main(String a[]) {
CrunchifyFindLineWithMaxWordCount object = new CrunchifyFindLineWithMaxWordCount();
object.readMaxLineCount("/Users/ashah/Documents/FindLongestLineFromFile.txt");
print("\n\nHere is a line with Maximum Word Count in it ====> ");
List<String> lineCount = object.getLines();
for (String crunchifyLine : lineCount) {
println(crunchifyLine);
}
println("Above line contains " + object.getCurrentMaxCount() + " words.");
}
public void readMaxLineCount(String crunchifyFile) {
Stream<String> crunchifyStream = null;
try {
// Read all lines from a file as a Stream. Bytes from the file are decoded into characters using the UTF-8 charset
crunchifyStream = Files.lines(Paths.get(crunchifyFile));
} catch (IOException exception) {
exception.printStackTrace();
}
print("============= Printing file FindLongestLineFromFile.txt =============\n");
crunchifyStream.forEach(line -> analyseLines(line));
}
private void analyseLines(String crunchifyLine) {
println(crunchifyLine);
// Split a string with any whitespace chars
int crunchifyCount = (crunchifyLine.split("\\s+")).length;
if (crunchifyCount > crunchifyMaxWords) {
lineCount.clear();
lineCount.add(crunchifyLine);
crunchifyMaxWords = crunchifyCount;
} else if (crunchifyCount == crunchifyMaxWords) {
lineCount.add(crunchifyLine);
}
}
private static void println(String crunchifyLine) {
System.out.println(crunchifyLine);
}
private static void print(String string) {
System.out.print(string);
}
}
Eclipse Console Result:
============= Printing file FindLongestLineFromFile.txt ============= Simplest Spring MVC Hello World Tutorial Refresh Div Content Without Reloading Page JavaScript & Validate Username, Phone Field & Top 10 Java Questions Step To Setup Apache Tomcat In Eclipse & Build RESTful Service Using JAX-RS & Jersey Print List Of All Loading Spring Beans Here is a line with Maximum Word Count in it ====> Step To Setup Apache Tomcat In Eclipse & Build RESTful Service Using JAX-RS & Jersey Above line contains 15 words.
I hope you find this tutorial useful and interesting. Let me know if you have any more questions.
The post In Java How to find a Line with Maximum Number of Words? Using Stream.forEach() Iterator appeared first on Crunchify.
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