74. What is boolean in Java?A value consisting of only true and false value A value consisting of 8 values Truthy value in java All of theseAnswer: A) A value consisting of only true and false valueExplanation:In Java, the boolean keyword is a primitive data type. It is used to ...
The boolean keyword has following two usages inJava: boolean data type boolean return type of a method The boolean keyword is adata typethat is used when declaring avariable. The possible values of a boolean variable aretrueorfalse. booleanb1=true;booleanb2=false; It is also used as areturn...
Let's see the prime number program in Java. In this Java program, we will take a number variable and check whether the number is Prime. class DemoProgram { public static void main(String[] args) { int num = 9; boolean Name = false; for (int i = 2; i < num; i++) { if (...
Here's the implementation of Bubble Sort Program in Java public class BubbleSort { public static void bubbleSort(int[] arr) { int n = arr.length; boolean swapped; for (int i = 0; i < n - 1; i++) { swapped = false; for (int j = 0; j < n - i - 1; j++) ...
// Retrieve and print the phone number of a specific contact String ramsNumber = contacts.get("Ram"); // Type-safe retrieval System.out.println("Ram's phone number: " + ramsNumber); // Check if a contact exists in the HashMap boolean hasShyam = contacts.containsKey("Shyam"); System...
boolean containsKey (Object key) If there is a key matching the given key in the HashMap, this method returns true. equals boolean equals (Object o) This method matches a given object with the HashMap. forEach void forEach (BiConsumer < ? super K,? super V > action) Performs given ‘...
The Boolean data type values may be the following: True or false Yes or no On or off value 1 or 0 These values create conditions and determine how a program behaves in response to a certain event (e.g., if "X condition" is true, then do "Y"). ...
Java 8 comes with several new functional interfaces in the package, java.util.function.Function<T,R> - takes an object of type T and returns R. Supplier<T> - just returns an object of type T. Predicate<T> - returns a boolean value based on input of type T. Consumer<T> - performs...
assert is aJava keyword used to define an assert statement. An assert statement is used to declare an expected boolean condition in a program. If the program is running with assertions enabled, then the condition is checked at runtime. ... expression1 is a boolean that will throw the asser...
RestController; import java.io.*; @SpringBootApplication @RestController public class SerializeDemo { public static void main(String[] args) { String file_name="D:\\Code\\java\\h0cksr_springboot_02\\src\\main\\java\\com\\example\\h0cksr_springboot_02\\employee.db"; Boolean end = ...