Given a string str, the task is to convert the given string to its boolean value.
Boolean datatype consists of only two values: true and false. If the string is true (ignoring case), the Boolean equivalent will be true, else false.
Examples:
Input: str = “true”
Output: true
Explanation: The boolean equivalent of true is true itself.
Input: str = “false”
Output: false
Explanation: The boolean equivalent of false is false itself.
Input: str = “yes”
Output: false
Explanation: The boolean equivalent of yes is false since the given value is not equal to true.
The methods to convert the string to its boolean value are as follows:
Method 1:
- Using Boolean.parseBoolean() method. This is the most common method to convert String to boolean.
- This method is used to convert a given string to its primitive boolean value.
- If the given string contains the value true ( ignoring cases) then this method returns true, if the string contains any other value other than true then the method returns false.
Syntax:
boolean boolValue = Boolean.parseBoolean(String str)
Below is the implementation of the above approach:
Java
class GFG { // Function to convert a string // to its boolean value public static boolean stringToBoolean(String str) { // convert a given string to // its primitive boolean value // using parseBoolean() method boolean b1 = Boolean.parseBoolean(str); // returns primitive boolean value return b1; } // Driver code public static void main(String args[]) { // Given String str String str = "yes"; // print the result System.out.println( stringToBoolean(str)); // Given String str str = "true"; // print the result System.out.println( stringToBoolean(str)); // Given String str str = "false"; // print the result System.out.println( stringToBoolean(str)); } } |
false true false
Method 2:
- Using Boolean.valueOf() method.
- It is similar to Boolean.parseBoolean() method, but it returns a boolean object instead of a primitive boolean value.
Syntax:
boolean boolValue = Boolean.valueOf(String str)
Below is the implementation of the above approach:
Java
class GFG { // Function to convert a string // to its boolean object public static boolean stringToBoolean(String str) { // convert a given string to // its boolean object using // valueOf() method boolean b1 = Boolean.valueOf(str); // returns boolean object return b1; } // Driver code public static void main(String args[]) { // Given String str String str = "yes"; // print the result System.out.println( stringToBoolean(str)); // Given String str str = "true"; // print the result System.out.println( stringToBoolean(str)); // Given String str str = "false"; // print the result System.out.println( stringToBoolean(str)); } } |
false true false
Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.
