Object Oriented Programming Lecture 6 Review Mustafa Emre

Object Oriented Programming Lecture 6: Review Mustafa Emre İlal emreilal@iyte. edu. tr

Recap • Last week: – Arrays + Strings – Assignment 05

Today • Assignment 05 - Solutions • Review • In-class coding exercises • Thinking in Java – Chapter 6, 7

Assignment 06. 1 1. Find the smallest distance between two neighboring numbers in an array: – – – Write a Java application that creates an array of 500 random doubles between 1 -100, and then prints out, the smallest difference between two neighboring numbers and where in the array it exists. e. g. In the sequence 4 8 6 1 2 9 4 the minimum difference is 1 (between 1 and 2). This exists between indexes 3 and 4. Hint: Use Math. abs() to calculate the difference between two numbers.

Assignment 06. 2 2. Check for Anagrams – An anagram is a word or a phrase that can be created by rearranging the letters of another given word or phrase. We ignore white spaces and letter case. e. g. : "Desperation" can be rearranged to the phrase "A Rope Ends It". – Implement a Java application that looks for all anagrams of a given String in an array of Strings. The array is given below. Pick any to use as the String to search for. – Hints: First prepare your Strings: Use. to. Lower. Case() method to convert all to lower case. Use. to. Char. Array() to convert the String into a char-array. Remember that char is a subset of int. char can be used in place of int. Try using it as index for an array holding counters for each letter of the alphabet.

Assignment 06. 2 2. Check for Anagrams – The words array to be used is: deductions discounted discounter introduces reductions harmonicas maraschino percussion supersonic

Assignment 06. 3 3. Remove duplicate elements – Write a Java Application that first creates an array of 20 random integers between 1 -20. – Prints out this array (on a single line) – Then removes duplicate values – The application should print out the final array along with its final size.

Next Week • Interfaces • Inner classes • Preperation: Thinking in Java Chapter 8 + 9