74 lines
1.8 KiB
Plaintext
74 lines
1.8 KiB
Plaintext
Review questions for test 2:
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1) Define the following words:
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- polymorphism
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- inheritance
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- dynamic binding
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- scope
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- variable shadowing
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- this()
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- super()
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- constructor chaining
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- toString
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- .equals
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- reference
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- object
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- class
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2) Write the method
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public String reverse(String s)
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which returns the String backwards.
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You may assume that s is not null.
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You must use recursion ONLY.
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{
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3) Write the method
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public boolean isPalindrome(String s)
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which returns true if and only if s is a palindrome, false otherwise.
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You may assume that s is not null.
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You must use recursion ONLY.
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Remember that a palindrome is a String that is the same forwards as
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backwards.
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4) Write the method
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public void printTwoSquares(int a, int b)
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which prints out two squares of # marks, one of size a, one
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of size b, that are next to each other.
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For example,
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printTwoSquares(3,5)
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would print
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### #####
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### #####
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### #####
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#####
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#####
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5) Given the following class:
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public class Clock
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{
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int time;
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public Clock(int time)
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{
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this.time=time;
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}
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}
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Write the class AlarmClock, which
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o is a subclass of Clock
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o has an int for alarmTime
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o has a constructor which takes both the alarmTime and the time,
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uses the super constructor to initalize time, and then intializes
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alarmTime
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o has a default constructor which constructor chains with 0 for
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the time and 0 for the alarm time
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o has an accessor and modifier for alarmTime
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6) Do you understand all of the concepts and how to code them from p2 phase I?
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Just memorizing the code is *NOT* the way to go.
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