initializing a boolean array in java - Stack Overflow
I just need to initialize all the array elements to Boolean false. Either use boolean[] instead so that all values defaults to false: boolean[] array = new boolean[size]; Or use Arrays#fill() to fill the entire array with Boolean.FALSE: Boolean[] array = new Boolean[size]; Arrays.fill(array, Boolean.FALSE); Also note that the array index is ...
What's the difference between boolean and Boolean in Java?
2014年3月6日 · In Java, a boolean is a literal true or false, while Boolean is an object wrapper for a boolean. There is seldom a reason to use a Boolean over a boolean except in cases when an object reference is required, such as in a List. Boolean also contains the static method parseBoolean(String s), which you may be aware of already.
object - Boolean vs boolean in Java - Stack Overflow
2010年9月16日 · A boolean inside of an object is alway as big as the word size of the VM, so it is usually the same size as a reference/pointer to a Boolean. On the stack that might be different. But when it is jitted, it is safe to assume it has the size of a machine word fitting to the CPU.
Boolean true - positive 1 or negative 1? - Stack Overflow
2013年3月29日 · Perhaps you want to rephrase by thinking about whether boolean operators produce something that is just one 0 or 1 bit (which works regardless of sign extension), or is all-zeroes or all-ones (and depends on sign extension of signed two's-complement quantities to maintain all-ones at any length). I think your life is simpler with 0 and 1.
Does == check for full equality in Booleans? - Stack Overflow
2012年6月17日 · It depends on whether you're talking about Booleans (the object wrapper, note the capital B) or booleans (the primitive, note the lower case b). If you're talking about Booleans (the object wrapper), as with all objects, == checks for identity, not equivalence. If you're talking about booleans (primitives), it checks for equivalence. So:
Do the &= and |= operators for bool short-circuit? - Stack Overflow
2014年4月16日 · When writing code like this in C++: bool allTrue = true; allTrue = allTrue && check_foo(); allTrue = allTrue && check_bar(); check_bar() will not be ...
if statement - if (boolean condition) in Java - Stack Overflow
2018年10月4日 · boolean state = "TURNED ON"; is not a Java valid code. boolean can receive only boolean values (true or false) and "TURNED ON"is a String. EDIT: now you are talking about a loop and your code does not contain any. your var state is false because the boolean default value and you execute the else clause.
How do I use a Boolean in Python? - Stack Overflow
2018年3月16日 · Boolean values are the two constant objects False and True. They are used to represent truth values (although other values can also be considered false or true). In numeric contexts (for example when used as the argument to an arithmetic operator), they behave like the integers 0 and 1, respectively.
When should I use Boolean instead of boolean? - Stack Overflow
2013年9月23日 · Boolean is an object, so you can use it with generics. For example, you can have Map<String,Boolean> to store a true\false value for each string(=key). You can't do Map<String,boolean>, because boolean is not an object - specifically, it's not a …
Boolean operators precedence - Stack Overflow
2012年9月19日 · This is a "different algebra" (boolean algebra). AND is a kind of multiplication, and OR is like addition. There are areas, where it is more important than standard algebra (e.g. construction of digital circuits).
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