Java中是否存在某种“和”语句？

Question

I have a question which I would like to be answered. I am in the making of a app which needs to use booleans. This is my code so far

if (but1 = true){
    //Do Something
}

But I would like to use a some type of and function in so I can say something like

if (but1 = true and but2 = true){
    //Do Something      
}

I have declared all my Boolean variables and would like to know if there is any type of function which will allow me to support this type of code which I need. Thanks

Answer 1

This is :

if (but1 && but2){
    //Do Something      
}

Just simple Java.

Answer 2

I think that should be written this way:

if (but1) {
    //Do Something      
}

if (but1 && but2){
        //Do Something      
            }

Answer 3

Logical and is & . && will shortcut the evaluation if the first parameter is false. Example:

// foo() and bar() will be called
if (foo() & bar()) {
}

// bar() will not be called if foo() returns false
if (foo() && bar()) {
}

Answer 4

Ok, this question has been been well answered, but just to make you aware:

if (but1 = true){
    //Do Something
}

will always evaluate as true as it takes the new value assigned to but1

Also using the '==' operator is unnecessary for booleans.

Answer 5

&& is also a short circuit operator. If the first evaluation fails the second is not checked. You can use one & which check both parts of the statement.

For example

if (a() && b()){...}

Will not evaluate b() if a() is false. If you had one & then b() is evaluated even if a() is false

This is the same for or (¦ and ¦¦)

Answer 6

You cannot compare variables with = . A single equals sign is used for assignment, where == is used for comparison.

In Java, you can do the following:

if (a == true && b == true)
{
//do code
}

Answer 7

Try this:

if (but1 == true && but2 == true) {
    // do something
}