Hai all
I want to print given array in reverse order Ex:
int a[]={1,2,3,4,5};display this array in reverse order.
Answer Posted / anandkumar
hai kumar you r wrong
with use of loop only we can reverse...
we can't do it with reverse() method b'coz this is not String Type....
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
What is the difference between a synchronized method and a synchronized block?
How can you share data between two thread in Java?
Is a string literal?
How many types of assembly languages are there?
What is the public method modifier?
When do we use synchronized methods in java?
What are desktop procedures?
a thread is runnable, how does that work? : Java thread
What is the difference between JVM and JRE?
What is the return type of the main method?
What is the use of System class?
Can arraylist hold different types java?
What is string pool?
The following program reads data (details of students) from a file named students.txt and converts it into e-mail addresses. The results are written to a file named studentemail.txt. students.txt consists of a number of lines, each containing the data of a student in colon delimited format: Last Name:First Name:Student Number Each input record is converted to an e-mail address and written to studentemail.txt in the following format: the first character of the last name + the first character of the first name + the last four digits of the student number + “@myunisa.ac.za” import java.io.*; public class EmailConverter { public static void main(String[] args) throws IOException { BufferedReader input = new BufferedReader(new FileReader ("students.txt")); PrintWriter output = new PrintWriter(new FileWriter ("studentemail.txt")); String line = input.readLine(); while (line != null) { // Extract the information for each student String[] items = line.split(":"); // Generate the email address String email = "" + items[0].charAt(0) + items[1].charAt(0) + items[2].substring(4,8) + "@myunisa.ac.za"; email = email.toLowerCase(); // Output output.println(email); line = input.readLine(); } input.close(); output.close(); } } Rewrite the class so that it handles possible errors that may occur. In particular, it should do the following: • It should catch at least three appropriate exceptions that might occur, and display suitable messages. • At this stage, the program will not run correctly if there is an empty line in the input file. Change the program so that if an empty line is encountered, an exception is thrown and the empty line is ignored. This exception should be handled with the display of a suitable error message. • Before the e-mail address is added to the output file, check if the student number has 8 digits. If not, throw an InvalidFormatException (which the program should not handle itself)
What is the purpose of void class?