Aug 1, 2016 · So, you should use boolean rather. Further, we initialize the boolean variable to false to hold an initial default value which is false. In case you have declared it as instance variable, it will automatically be initialized to false. But, its completely upto you, whether you assign a default value or not.

Jan 5, 2017 · Edit: Sometimes you can't return early because there's more work to be done. In that case you can declare a boolean variable and set it appropriately inside the conditional blocks.

Oct 4, 2018 · 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.

Oct 25, 2010 · A Java conditional requires a boolean value. If you can put it into an if statement, it's already a boolean, and requires no further fiddling if what you want is a boolean. Indeed, constructs like value == true can be tricky. I don't offhand remember the promotion rules in Java, but in C++ a bool can be promoted to an int, with false becoming 0 ...

You have a number of issues: you are attempting to call a non-static method statically; method names in java are case sensitive and you've mixed up the case.

You probably appropriately chose the primitive type boolean in your example but since you mentioned "Boolean" with a capital "B", there is a difference. Boolean variables are nullable unlike the primitive "boolean" with a lower case "b". If you had used Booleans, you can simply initialize those like. Boolean boolVar = Boolean.TRUE; //or Boolean ...

/* 2. Write a Java method to check whether a string is a valid password. Password rules: A password must have at least ten characters. A password consists of only letters and digits. A password must contain at least two digits. Expected Output: A password must have at least eight characters. A password consists of only letters and digits.

Feb 12, 2013 · I'm trying to create a boolean method called isAvailable that accepts a seat number on a flight as a parameter, returns a boolean that indicates whether that seat is available. With code similar to a tic-tac-toe program, the code will convert a seat number like 20 into a row and column index for the two-dimensional array.

There is a markable point between setter/getter method of the data type Boolean and boolean in side a class ( for pojo/entity). For both Boolean and boolean the setter method should be setXXX() but getter method would be getXXX() and isXXX() respectively; Example: (a) if property is defines as Boolean. private Boolean check; the setter/getter ...

Feb 19, 2020 · In general, ! is a perfectly good and readable boolean logic operator. No reason not to use it unless you're simplifying by removing double negatives or applying Morgan's law.!(!A) = A or!(!A | !B) = A & B As a rule of thumb, keep the signature of your boolean return methods mnemonic and in line with convention.