Operators - Dan Chisholm question

[Jerry Bustamente]

Hello,

I am stumped by a single topic question in Dan's excellent mock exams. I literally cannot understand the boolean = statements. Could someone help?

Here is the Q and A:

Question 14
class EBH023 {
static String m1(boolean b){return b?"T":"F";}
public static void main(String [] args) {
boolean b1 = false?false:true?false:true?false:true;
boolean b2 = false?false true?false true?false:true));
boolean b3 = ((false?false:true)?false:true)?false:true;
System.out.println(m1(b1) + m1(b2) + m1(b3));
}}

What is the result of attempting to compile and run the program?

a. Prints: FFF
b. Prints: FFT
c. Prints: FTF
d. Prints: FTT
e. Prints: TFF
f. Prints: TFT
g. Prints: TTF
h. Prints: TTT
i. Run-time error
j. Compile-time error
k. None of the above


Answer:

14 b Prints: FFT The expression used to assign variable b1 is equivalent to the expression used to assign variable b2. The results demonstrate that the conditional operator (? groups from right-to-left.

Help!

Thanks in advance.

Jerry Bustamente

[Mubeen Shaik]

Hello,

Code is like this.
=====================================================

  
 
class EBH023 {
  static String m1(boolean b){return b?"T":"F";}
  public static void main(String [] args) {
    boolean b1 = false?false:true?false:true?false:true;
    boolean b2 = false?false : ( true?false : ( true?false:true));
    boolean b3 = ((false?false:true)?false:true)?false:true;
    System.out.println(m1(b1) + m1(b2) + m1(b3));
}}
 

Thanks,
Mubeen Shaik.

[ December 14, 2004: Message edited by: Mubeen Shaik ]

[ December 14, 2004: Message edited by: Mubeen Shaik ]
[ December 14, 2004: Message edited by: Mubeen Shaik ]

[Mike Gershman]

Please see this thread which analyzes this question:
https://coderanch.com/t/247148/java-programmer-SCJP/certification/Couple-questions-Operators