Related Topics JAVA Programming Question 8 How does the clone() method work in java.lang.Object class? Answer The clone() method in the java.lang.Object class is used to create a new object that is a copy of an existing object. The general syntax for using clone() is: Object obj1 = new Object(); Object obj2 = obj1.clone(); To […]
Related Topics JAVA Programming Question 1 What is java.lang package and what is its significance in Java? Answer The java.lang package is a core package in Java that contains fundamental classes and interfaces that are automatically imported into every Java program. This package provides basic functionality for Java programs and includes classes for working with
Related Topics JAVA Programing Question 23 How do you handle null and empty Strings in Java, and what is the difference between them? Answer In Java, a null String is a reference to a String object that does not point to any memory location, while an empty String is a String object that has a
Related Topics JAVA Programming Question 18 Can you explain the use of the toLowerCase and toUpperCase methods in Java for converting a String to lowercase or uppercase? Answer The toLowerCase() and toUpperCase() methods in Java are used to convert the characters in a string to lowercase or uppercase, respectively. Here’s an example of using the
Related Topics JAVA Programming Question 12 Can you give an example of using the indexOf method in Java for finding the first occurrence of a substring in a String? Answer In Java, the indexOf() method is used to find the index of the first occurrence of a specified substring in a string. The method takes
Related Topics JAVA Programming Question 6 Can you explain the use of the equals method in Java for comparing two Strings for equality and what is the difference between == and equals for Strings? Answer In Java, the equals() method is used to compare the contents of two strings for equality. The method returns a
Related Topics JAVA Programming Question 1 What is a String in Java and how is it different from a character array? Answer In Java, a string is an object that represents a sequence of characters. It is a built-in class in the Java standard library, and it provides many methods to manipulate strings. A string
Related Topics JAVA Programming Question 10 Can you explain the use of generic arrays in Java and how to create and access them? Answer In Java, it is not possible to create an array of a generic type directly. This is because Java’s implementation of generics, known as type erasure, removes the generic type information
Related Topics JAVA Programming Question 6 Can you explain the concept of type bounds in Java generics and how they can be used to restrict the types that can be used as type arguments? Answer In Java generics, type bounds are used to restrict the types that can be used as type arguments. A type
Related Topics JAVA Programming Question 1 What are generics in Java and why were they introduced in the language? Answer Generics in Java are a feature introduced in Java 5 that allow you to define classes, interfaces, and methods that can work with different types of objects while providing type safety at compile time. The
