Java | JSP | JSF Answers

/*
** file: SafeDNS.java
** purpose: This interface defines the services required of
** to block banned sites.
*/
public interface SafeDNS {
// blacklist(ipa) adds thus IPA to a blacklist.
// A blacklisted IPA will not be returned by the
// lookUp method.
2
public void blacklist(String ipa);
}

• Make your DNS class also implement this interface, using the fastest suitable class from
the collections framework to store and look up IPAs in a blacklist.
• Extend your test program so that sites may be blacklisted and we can test that their IPAs
are not being returned.

/*
** file: BasicDNS.java
** purpose: This interface defines the services required of
** any DNS.
*/
public interface BasicDNS {
// update(domain, ipa) adds (or replaces)
// the IPA for this domain to the DNS database.
public void update(String domain, String ipa);
// lookUp(ipa, domain) returns the IPA associated
// with this domain, or null if it is not found in
// the database (or not returnable for legal reasons,
// such as blacklisting).
// The first argument, ipa, is the IPA from which this
// request originated.
public String lookUp(String ipa, String domain);
}

• Implement a class that implements the interface, using the fastest suitable class from the
collections framework to store and look up domain IPAs.
• Implement a test program that exercises your DNS class. It should have a simple, interactive
console user interface.

I need to write a program that accepts one command line argument, the name of a file containing data to be drawn as a pie chart, and draws the pie chart in a window.
• Sample data file, birds.txt, contains the one-word categories of birds, and the number of each kind.
swallow 10
magpie 5
fairywren 7
osprey 2
fantail 3
• The pie chart must use a different colour for each pie segment, and display a legend that shows the labels and the percentage for each.
• Your program should support up to 10 categories.

Write a program that will read in a binary number (base 2) and a hexadecimal value (base 16). Your program then calculates and shows the equivalent decimal values for both the binary value and the hexadecimal value.

You have a credit account in a bank that gives you credit card service. The minimum payment for an account holder to pay back to the bank is 5% of the total credit balance (the outstanding balance) monthly. Assuming you always spend the same amount every month and you always pay only the minimum payment to the bank. Write a program to read in the monthly credit amount (one time only) and display the calculations for the columns shown below until the outstanding balance is more than one hundred thousand:

What is your monthly expenses: 2000

Month Current month Accumulated Payment made Outstanding balance
expenses amount
1 2000 2000 100 1900

A method called debit that withdraws money from an Account. Ensure that the debit amount does not exceed the Account’s balance. If it does, the balance should be left unchanged and the method should print a message indicating “Debit amount exceeded account balance.”

Write a program that accepts one command line argument, the name of a file containing data to be drawn as a pie chart, and draws the pie chart in a window.
• Sample data file, birds.txt, contains the one-word categories of birds, and the number of each kind.
swallow 10
magpie 5
fairywren 7
osprey 2
fantail 3
• The pie chart must use a different colour for each pie segment, and display a legend that shows the labels and the percentage for each.
• Your program should support up to 10 categories.

How to detect and break a infinite loop in the java program, grammatically.

Assuming the ocean's level is currently rising at about 1.6 millimeters per year, write a program called ocean_levels.js, that displays the number of millimeters, that the ocean will have risen each year for the next 25 years. thank you very much!