Convert boolean to int in Java

Question

What is the most accepted way to convert a boolean to an int in Java?

Answer 1

Hello,

int myInt = (myBoolean)?1:0 ;

^^

PS : true = 1 and false = 0

Answer 2

If true -> 1 and false -> 0 mapping is what you want, you can do:

boolean b = true;
int i = b ? 1 : 0; // assigns 1 to i.

Answer 3

int val = b? 1 : 0;

Answer 4

boolean b = ....; 
int i = -("false".indexOf("" + b));

Answer 5

That depends on the situation. Often the most simple approach is the best because it is easy to understand:

if (something) {
    otherThing = 1;
} else {
    otherThing = 0;
}

or

int otherThing = something ? 1 : 0;

But sometimes it useful to use an Enum instead of a boolean flag. Let imagine there are synchronous and asynchronous processes:

Process process = Process.SYNCHRONOUS;
System.out.println(process.getCode());

In Java, enum can have additional attributes and methods:

public enum Process {

    SYNCHRONOUS (0),
    ASYNCHRONOUS (1);

    private int code;
    private Process (int code) {
        this.code = code;
    }

    public int getCode() {
        return code;
    }
}

Answer 6

public interface StackOverflow {
    public String askQuestionAndReturnTheBestAnswer(String question);
}

public class ConvertionUtils {
    public static int convertBooleanToIntInAMostAcceptableWay(StackOverflow stackOverflow, boolean value) {
        assert stackOverflow != null;
        if (value == true) {
            return stackOverflow.askQuestionAndReturnTheBestAnswer(
                    "Which integer value is the most acceptable for boolean \"true\" in Java?");
        } else {
            return stackOverflow.askQuestionAndReturnTheBestAnswer(
                    "Which integer value is the most acceptable for boolean \"false\" in Java?");
        }
    }
}

I think I don't need to post the implementation of StackOverflow interface.

Best Regards
Dr. Dr. Sheldon Lee Cooper

Answer 7

public int boolToInt(boolean b) {
    return b ? 1 : 0;
}

simple

Answer 8

From apache, which has awesome libraries!

http://people.apache.org/~bayard/commons-lang-3.0-snapshot-api/org/apache/commons/lang/BooleanUtils.html#toInteger%28boolean%29

Answer 9

Using the ternary operator is the most simple, most efficient, and most readable way to do what you want. I encourage you to use this solution.

However, I can't resist to propose an alternative, contrived, inefficient, unreadable solution.

int boolToInt(Boolean b) {
    return b.compareTo(false);
}

Hey, people like to vote for such cool answers !

Edit

By the way, I often saw conversions from a boolean to an int for the sole purpose of doing a comparison of the two values (generally, in implementations of compareTo method). Boolean#compareTo is the way to go in those specific cases.