Usage of boolean in java

The boolean type in Java represents a Boolean value, that is, true or false. Usage: Declare Boolean variables: boolean Assign true or false: = true/false Operators: && (logical AND), || (logical OR), ! (Logical NOT) Boolean expressions are used for conditional judgment and loop control. The ternary operator selects between two values ​​based on the Boolean value. The Boolean array can store multiple Boolean values. Boolean wrapper class can convert Boolean values ​​into objects

The use of boolean type in Java

What is the boolean type?

The boolean type is a basic data type in Java that represents a Boolean value, which is true or false.

Usage of boolean

1. Boolean variable declaration

To declare a boolean variable, use the following syntax:

boolean myBooleanVariable;

2. Boolean value assignment

You can use Boolean value true (true) or false (false) to assign a value to a boolean variable ：

myBooleanVariable = true;
myBooleanVariable = false;

3. Boolean operators

The boolean type supports the following operators:

• Logical AND (&&): If both operands are true, the result is true; otherwise, it is false.
• Logical OR (||): If one of the two operands is true, the result is true; otherwise, it is false.
• Logical NOT (!): Invert the Boolean value of the operand.

4. Boolean expression

boolean variables and operators can be combined to form Boolean expressions for conditional judgment and loop control:

if (myBooleanVariable == true) {
    // ...
}

5. Ternary operator

The ternary operator can choose between two values ​​based on the value of a Boolean expression:

String result = myBooleanVariable ? "真" : "假";

6. Boolean array

You can declare a Boolean array to store multiple Boolean values:

boolean[] myBooleanArray = new boolean[5];
myBooleanArray[0] = true;

7. Boolean wrapper class

Java also provides a Boolean wrapper class, which can convert boolean values ​​into objects. This is useful in certain situations, such as when you need to pass a boolean value to a method that accepts an Object object.

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