Because of this new rule, be sure you know how to use the BlueJ debugger!!!!! It will really help you prepare for this test. If you need a review check out the link in the Helpful Hints section of the course.1) Know how all of the string functions work. Here s a link you should review:http://www.tutorialspoint.com/java/java_strings.htmFor example how does this block of code work?public static void main(String args[]){String joeString = AP CompSci String temp;int k = 1;for ( int j = 1; j = joeString.length(); j++){temp = joeString.substring(k,j);System.out.print(temp + }}Here s the sample output. PP P CP CoP ComP CompP CompSP CompScP CompSciWhy do I get what I get? Why was the A not printed? Why is P printed twice…or is it? Run it in the debugger so you see what s going on.2) Know your integer arithmetic!!! We ve tested it before and we ll test it again. Check out this code segment in the debugger….int result;int c = 13;result = 13/3;result = c/3;Do you get the same result? Why or why not?3) Be able to walk through the code, especially when you re using string functions like length and substring.4) Know the important difference between the == and .equal() method. Check out the reference link here and run their example in the debugger and understand why you get what you get. Reference Link: http://www.programmerinterview.com/index.php/java-questions/java-whats-the-difference-between-equals-and/5) Know all there is to know about .compareTo method as well!! Test this code and be sure you know which ones return values of True and which ones return False”.public static void main(String args[]){String strA = TARHEELS String strB = tarheels String strC = tar boolean result;result = strA.compareTo(strB) 0 strB.compareTo(strC) result = strB.compareTo(strA) 0 || strC.compareTo(strA) result = !(strA.equals(strB) strC.compareTo(strB) result = !(strA.equals(strB)) strC.compareTo(strA) }6) Make sure you understand how to use the indexof method. What would the value of str be and why?Example:String line = Some more silly stuff on Strings! int x = line.indexOf( m String str = line.substring(10,15) + line.substring(25,25+x); Check out this code as well….. String alpha = ABCDEFGHIJKLMNOPQRSTUVWXYZ int k = alpha.indexOf( H int j = alpha.indexOf( A int z = alpha.indexOf( a char xstr=alpha.charAt(12);What s the values of xstr, k, j, and z? Be sure you understand why!Now, write some test code using them in the substring method and be sure you understand how they work. Here s a good reference link: http://www.tutorialspoint.com/java/java_string_substring.htm7) What does it mean to be equal to as opposed to reference the same string object?For example: After executing the following block of code does s1 and s2 reference the same string object?String s1= Mr. Zaengle String s2= Dr. Fisher s1=s2;8) Try out the following blocks of code and see what you get. Are they correct expressions? If not, then why not? If they are, what do you get?

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