JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Write a program to get a line with max word count from the given file.


Description:

Below example shows how to find out the line with maximum number of word count in the given file. In case if it has multiple lines with max number of words, then it has to list all those lines.


Code:
package com.java2novice.algos;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class MaxWordCountInLine {

	private int currentMaxCount = 0;
	private List<String> lines = new ArrayList<String>();
	
	public void readMaxLineCount(String fileName){

		FileInputStream fis = null;
		DataInputStream dis = null;
		BufferedReader br = null;
		
		try {
			fis = new FileInputStream(fileName);
			dis = new DataInputStream(fis);
			br = new BufferedReader(new InputStreamReader(dis));
			String line = null;
			while((line = br.readLine()) != null){
				
				int count = (line.split("\\s+")).length;
				if(count > currentMaxCount){
					lines.clear();
					lines.add(line);
					currentMaxCount = count;
				} else if(count == currentMaxCount){
					lines.add(line);
				} 
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally{
			try{
				if(br != null) br.close();
			}catch(Exception ex){}
		}
	}

	public int getCurrentMaxCount() {
		return currentMaxCount;
	}

	public void setCurrentMaxCount(int currentMaxCount) {
		this.currentMaxCount = currentMaxCount;
	}

	public List<String> getLines() {
		return lines;
	}

	public void setLines(List<String> lines) {
		this.lines = lines;
	}
	
	public static void main(String a[]){
		
		MaxWordCountInLine mdc = new MaxWordCountInLine();
		mdc.readMaxLineCount("/Users/ngootooru/MyTestFile.txt");
		System.out.println("Max number of words in a line is: "+mdc.getCurrentMaxCount());
		System.out.println("Line with max word count:");
		List<String> lines = mdc.getLines();
		for(String l:lines){
			System.out.println(l);
		}
	}
}

MyTestFile.txt:
true, false, and null might seem like keywords, but they are actually literals.
You cannot use them as identifiers in your programs. The servlet context
is an interface which helps to communicate with other servlets. It contains
information about the Web application and container. It is kind of
application environment. Using the context, a servlet can obtain URL
references to resources, and store attributes that other servlets in the
context can use.

Output:
Max number of words in a line is: 13
Line with max word count:
true, false, and null might seem like keywords, but they are actually literals. 
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Knowledge Centre
Can interface be final?
No. We can not instantiate interfaces, so in order to make interfaces useful we must create subclasses. The final keyword makes a class unable to be extended.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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