Java Boolean In 'IF' Statement Not Functioning

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in java the operand to test equality between two items is == not '=' which is an assignment; an assignment returns the assigned value, so your :

if (playerOne = true)

will always be true as playerOne will be assigned to true, then the if will become if (true) and the statement associated will always be executed.

the best way to refactor your code is:

    public void mouseClicked(MouseEvent arg0) {
        if(playerOne) {
            playerOne = false;
            playerTwo = true;
            boxOne.setIcon(xIcon);                  
        } else if(playerTwo) {
            playerOne = true;
            playerTwo = false;
            boxOne.setIcon(oIcon);
       }
    }

as the something == true would be redundant.

java for complete beginners - boolean values, A Boolean value is one with two choices: true or false, yes or no, 1 or 0. In Java, there is a variable type for Boolean values: boolean user = true;. So instead of� A Boolean expression is a Java expression that, when evaluated, returns a Boolean value: true or false. Boolean expressions are used in conditional statements, such as if, while, and switch. The most common Boolean expressions compare the value of a variable with the value of some other variable, a constant, or perhaps a simple arithmetic expression.

if(playerTwo = true)

== not =.

Wouldn't it be simpler to have a "currentPlayer" integer that is either 1 or 2 instead though? This would also prevent the (presumably impossible) state of having both players active at once.

Boolean (Java Platform SE 7 ), Boolean. public Boolean(String s). Allocates a Boolean object representing the value true if the string argument is not null� The Boolean class wraps a value of the primitive type boolean in an object. An object of type Boolean contains a single field whose type is boolean . In addition, this class provides many methods for converting a boolean to a String and a String to a boolean , as well as other constants and methods useful when dealing with a boolean .

You are using an assignment here

if (playerTwo = true)

replace with

if (playerTwo == true)

or better

if (playerTwo)

Java If Boolean, Java Comparison Operators: <, <=, >, >= The easiest way to get a boolean value (true or false) is using a comparison expression, such as (a < 10). The less� In Java, the boolean keyword is a primitive data type. It is used to store only two possible values, either true or false. It specifies 1-bit of information and its "size" can't be defined precisely. The boolean keyword is used with variables and methods.

Java, There are two ways to convert a String to boolean in Java, first, by using Boolean. parseBoolean() method and second, by using Boolean.valueOf() method. boolean is a primitive data type in Java. boolean means true or false i.e. logical true or false. It occupies 1 bit in memory. These values do not correspond to 1 or 0 as in C or C++. The following example shows how to use boolean data type in Java.

Java.lang.Boolean Class in Java, Java provides a wrapper class Boolean in java.lang package. The Boolean class wraps a value of the primitive type boolean in an object. Java Boolean operators. There are following boolean operators supported by Java language.Assume variable A holds 10 and variable B holds 20, then −OperatorDescriptionExample== (equal Home. Jobs.

Java Boolean Examples, Java program that uses boolean, true, false public class Program { public static void main(String[] args) { // Test true and false booleans. boolean value = true;� We can convert boolean to String in java using String.valueOf (boolean) method. Alternatively, we can use Boolean.toString (boolean) method which also converts boolean into String. 1) String.valueOf () The String.valueOf () method converts boolean to String.