I have 2 classes: And also my own defined comparators(rules): These comparators are defined so that an empty String is treated the same as null, an empty Collection is treated the same as null, and a Boolean false is treated the same as null. In the main method I try to compare 2 objects so as to check if the
Tag: boolean
how to traverse a Boolean recursion array
The exercise: Build a recursion(with no loops) that every cell that you go inside is the number of steps that you can go, it could be right/left until you get to the last cell. if you can’t get to the last cell return false, else return true. you must start from index 0. My problem: I build the program, it’s
Utility method to convert Boolean into boolean and handle null in Java
Is there a utility method in Java which converts Boolean into boolean and automatically handles null reference to Boolean as false? Answer How about: ? That’s a single expression, which will only evaluate to true if value is non-null and a true-representing Boolean reference.
Boolean flags aren’t corresponding to the switch they are in
I’m trying to make a traffic simulator and I completely underestimated how hard it was going to be to get all the classes to work together. I’ve finally gotten all the functions to work quite well, and am now I’m trying to put them together. On my lights algorithm I’ve gotten the lights to change fine on a timer, but
Setting all values in a boolean array to true
Is there a method in Java for setting all values in a boolean array to true? Obviously I could do this with a for loop, but if I have (for example) a large 3D array, I imagine using a loop would be quite inefficient. Is there any method in Java to set all values in a certain array to true,
Count the number of “trues” for n booleans
I would like to count the number of trues, each result should have its own associated action. Maybe something like: Any idea of how to write the getResult method body a pretty way? In the example, I used only four, but it should be extendable to a bigger number of booleans. Any other way to proceed is welcome. Answer Write
Java for Android – how to create event listener for boolean variable
I am creating an android application using Java. I have a boolean variable called “movement”. I want to create an event that triggers when the value of “movement” changes. Any pointers in the right direction would be great. Thank you Answer A variable is not alone, I presume. It resides as a member in a class – right? So the
Convert boolean to int in Java
What is the most accepted way to convert a boolean to an int in Java? Answer ^^ PS : true = 1 and false = 0
Differences among various bool types?
What are the differences among bool, boolean and Boolean in Java/Android? Answer bool does not seem to exist, at least I can’t find references to it. boolean is a primitive boolean type, not an object. Boolean is the wrapper object for a boolean.
Java: for loop, incompatible types
I’m trying to run this for loop; However every time I try to compile I get an error stating ‘incompatible types – found int but expected boolean’ I can’t work out what I’m doing wrong! Answer the second statement: grid[0].length is an integer. The second statement in a for loop is a condition statement and needs to be a boolean.