In this article, we have compiled a comprehensive list of insightful Java String Interview Questions for both Freshers and Experienced that focus on a range of topics including thread-safety, immutability, string methods in Java, StringBuilder and StringBuffer, memory consumption, comparing String instances in Java, using String as the key in HashMap, equals() vs = check for String, etc. It is therefore one of the hottest and most important topics in Java interviews. Whether it's a Java desktop application, enterprise application, web application, or mobile application, every Java application makes use of the String class. The String class in Java is among the fundamentals of Java programming and therefore, knowledge of String is a prerequisite for every Java programmer. When it comes to Java interview questions, interviewers sometimes pay close attention to the Java string. Over the past 25 years, Java has been a popular programming language among all developers because of its user-friendly and flexible nature that can be used for platforms and web applications development. What will be the output of the below program? Write a program to check whether the given input string is a palindrome. How can we remove a specific character from a String? In what way should two strings be compared to determine whether they are anagrams? Is it possible to count the number of times a given character appears in a String?
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How to convert an Array to String in Java? Write a program to calculate the total number of characters in the String? How to print all permutations of string in Java? How many objects will be created for the following codes: How do you check whether a String is empty in Java? How can we convert string to StringBuilder? In Java, how do you convert a string to an integer and vice versa? How can a Java string be converted into a byte array? Why char array is preferred over a String in storing passwords?
What is the best way to split a string in Java? Why is a string used as a HashMap key in Java? What are the different string methods in Java? Java String Interview Questions for Experienced.Can we use a string in the switch case in java? What is the use of the substring() method in Java? Is it possible to compare Strings using the = operator? If so, what is the risk involved? What is the difference between str1 = str2 and str1.equals(str2)? In Java, how can two strings be compared? State the difference between StringBuffer and StringBuilder in Java. State the difference between String and StringBuffer.
What does the string intern() method do in Java? Is String immutable or final in Java? If so, then what are the benefits of Strings being Immutable? State the difference between String in C and String in Java. Is String a primitive or derived type in Java?
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