Java Convert String to boolean

In Java, you can convert a string to a boolean using the Boolean.parseBoolean() method. This method takes a string as input and returns a boolean value.

Here’s an example:

String str = "true";
boolean boolValue = Boolean.parseBoolean(str);
System.out.println(boolValue);

This will output true because the string “true” is converted to a boolean value of true.

You can also convert a string to a boolean using the Boolean.valueOf() method. This method takes a string as input and returns a Boolean object that wraps a boolean value.

Here’s an example:

String str = "false";
Boolean boolObj = Boolean.valueOf(str);
System.out.println(boolObj);

This will output false because the string “false” is converted to a Boolean object that wraps a boolean value of false.

Note that both methods are case-insensitive, meaning that they will convert strings such as “TRUE”, “True”, “true”, “FALSE”, “False”, and “false” to their respective boolean values.

Java String to boolean Example: Boolean.parseBoolean()

Sure, here’s an example of how to use the Boolean.parseBoolean() method to convert a string to a boolean value in Java:

public class StringToBooleanExample {
    public static void main(String[] args) {
        String str1 = "true";
        String str2 = "false";
        String str3 = "not a boolean value";
        
        boolean bool1 = Boolean.parseBoolean(str1);
        boolean bool2 = Boolean.parseBoolean(str2);
        boolean bool3 = Boolean.parseBoolean(str3);
        
        System.out.println("bool1: " + bool1); // true
        System.out.println("bool2: " + bool2); // false
        System.out.println("bool3: " + bool3); // false (because the string is not a valid boolean value)
    }
}

In this example, we declare three string variables (str1, str2, and str3) and assign them the values “true”, “false”, and “not a boolean value”, respectively. We then use the Boolean.parseBoolean() method to convert each string to a boolean value and store the result in a boolean variable (bool1, bool2, and bool3, respectively). Finally, we print out the value of each boolean variable using System.out.println().

Note that the Boolean.parseBoolean() method returns false if the input string is not a valid boolean value. In this example, bool3 is false because the string “not a boolean value” is not a valid boolean value.

Java String to Boolean Example: Boolean.valueOf()

Sure, here’s an example of how to use the Boolean.valueOf() method to convert a string to a Boolean object in Java:

public class StringToBooleanExample {
    public static void main(String[] args) {
        String str1 = "true";
        String str2 = "false";
        String str3 = "not a boolean value";
        
        Boolean bool1 = Boolean.valueOf(str1);
        Boolean bool2 = Boolean.valueOf(str2);
        Boolean bool3 = Boolean.valueOf(str3);
        
        System.out.println("bool1: " + bool1); // true
        System.out.println("bool2: " + bool2); // false
        System.out.println("bool3: " + bool3); // java.lang.IllegalArgumentException: For input string: "not a boolean value"
    }
}

In this example, we declare three string variables (str1, str2, and str3) and assign them the values “true”, “false”, and “not a boolean value”, respectively. We then use the Boolean.valueOf() method to convert each string to a Boolean object and store the result in a Boolean variable (bool1, bool2, and bool3, respectively). Finally, we print out the value of each Boolean variable using System.out.println().

Note that the Boolean.valueOf() method throws an IllegalArgumentException if the input string is not a valid boolean value. In this example, an exception is thrown for bool3 because the string “not a boolean value” is not a valid boolean value.