FileHandling Programming Assignments

Q1. Write a java program to read a file named input.txt and store each line of a file as string in ArrayList ignore the lines which are started with # character and empty lines? Example: Let file input.txt contains the following contents: aaaaa abababa #acdef cabef #a

Output : ArrayList contains only the following data
		aaaaa
		abababa
		cabef

Q2: Write a java program to check whether the string prefix matches the any one of the prefixes mentioned in the file prefix-urlfilter.txt?

Note : The format of this file is one URL prefix per line.    
	Let File contents are 	
	http://
	https://
	ftp://
	file://
Input1:  http://www.example.com/
Output1: true
Input2: https://www.example.com/
Output2: true
   	Input3:  ftp://www.example.com/
Output3: true	      
Input4: file://www.example.com/
Output4: true
   	Input5 : abcd://www.example.com/
Output5: false

Q3: Write a java program to read any .java file and remove comments in it? Example: Sample java file /** * The HelloWorld program implements an application that * simply displays "Hello World!" to the standard output. * * @author Zara Ali * @version 1.0 * @since 2014-03-31 */ public class HelloWorld {

			   public static void main(String[] args) {
			      // Prints Hello, World! on standard output.
			      System.out.println("Hello World!");
			   }
			}

Output : 		
			public class HelloWorld {

			   public static void main(String[] args) {
			      System.out.println("Hello World!");
			   }
			}

File Handling Assignments Part 2

Q1: Write Java program to convert the characters of a file to uppercase? Input : Let file cntents: Use this assignment to learn reading and writing to file Output: USE THIS ASSIGNMENTS TO LEARN READING AND WRITING TO FILE

Q2: Write a java code to delete the words from a string that are prsent in a file named stopwords.txt? Note: stopwords.txt contains the words as comma seperated Example stopwords.txt: a,able,about,across,after,all,almost,the,to,is

Input: TextString : This is Java assignment helps you to understand the files. stopwords.txt: a,able,about,across,after,all,almost,the,to,is,this Output: Java assignment helps understand files

Hint: Try to load the stopwords.txt in to HashSet and chack every word of string present in the HashSet if present remove the word. Use the split method of string to tokenize the stopwords.txt file lines with ,