This week's book giveaway is in the Agile and other Processes forum. We're giving away four copies of The Mikado Method and have Ola Ellnestam and Daniel Brolund on-line! See this thread for details.
What is the output for the following lines of code? 1: System.out.println(" " +2 + 3); 2: System.out.println(2 + 3); 3: System.out.println(2 + 3 +""); 4: System.out.println(2 + "" +3);
A) Compilation error at line 3 B) Prints 23, 5, 5 and 23. C) Prints 5, 5, 5 and 23. D) Prints 23, 5, 23 and 23.
Roll
Ranch Hand
Joined: Jan 20, 2000
Posts: 52
posted
0
Its B).
Ray Marsh
Ranch Hand
Joined: Jan 12, 2000
Posts: 458
posted
0
Why is (2 + 3 + "" ) = 5 and ( " " + 2 + 3 ) = 23? What is the trigger to make the answer a string or integer?
Anxiety does not empty tomorrow of its sorrows, but only empties today of its strength. – Charles Spurgeon
Tony Alicea
Desperado
Sheriff
Joined: Jan 30, 2000
Posts: 3219
posted
0
The way I see it is that the expression is evaluated from left to right, 3+3 is 5 and then it is made a string. In: " " + 2 + 3 first 2 is made a string because of the ""+... and then 3 is made "3" and is concatenated to "2".
Tony Alicea Senior Java Web Application Developer, SCPJ2, SCWCD
0
