Java Tutorial

Java Tutorial Java Features C++ vs Java Java History Java Hello World Java Development Kit Java Runtime Environment Java Virtual Machine Difference between JDK, JRE, and JVM Memory Areas in Java Java Operators Java Keywords Primitive Data Types Variables

Java Loops

Java Do While Loop Java While Loop Java For Loop Java Enhanced For Loop

Java Programs

Java Basic Programs Factorial Program in Java Fibonacci Series Program in Java Prime Number Program in Java Palindrome Number Program in Java Armstrong Number Program in Java Anagram Program in Java Pattern Programs in Java Calculator Program in Java Leap Year Program in Java Addition Program in Java Number Pattern Programs in Java Star Pattern Programs in Java Package Program in Java Pyramid Program in Java Sorting Program in Java String Palindrome Program in Java Even Odd Program in Java For Loop Program in Java If Else Program in Java Switch Case Program in Java GCD Program in Java LCM Program in Java Hello Program in Java Matrix Program in Java Menu Driven Program in Java Series Program in Java Client Server Program in Java Swapping Program in Java Pig Latin Program in Java Tower of Hanoi Program in Java Recursion Program in Java Matrix Multiplication Program in Java Perfect Number Program in Java Classes and Objects in Java Example Programs String Programs in Java Array Programs in Java Constructor Program in Java Inheritance Program in Java Abstract class Program in Java Interface Program in Java Encapsulation Program in Java Polymorphism Program in Java Exception Handling Program in Java Multithreading Program in Java Thread Program in Java Collection Programs in Java ArrayList Program in Java Stack Program in Java Applet Program in Java Swing Program in Java JDBC Program in Java How to run Java program in command prompt How to run Java program in Eclipse

Java Sorting

Sorting Algorithms in Java Merge Sort in Java Quick Sort in Java Bubble Sort in Java Insertion Sort in Java Selection Sort in Java Heap Sort in Java Radix Sort in Java Topological Sort in Java Bucket Sort in Java Counting Sort in Java

Java OOPs Concepts

OOPs - Object Oriented Programming Objects and Classes in Java Java Naming Conventions Constructors in Java Java this keyword Java static keyword Inheritance in Java Aggregation in Java Java super keyword Constructor Chaining and Constructor Overloading Java Polymorphism Static and Dynamic Binding in Java Java Abstraction Abstract class in Java Interface in Java Difference between Abstract class and Interface Java final keyword Packages in Java Access Modifiers in Java Java Wrapper classes Java Numbers Java Characters Java Integer Java Boolean Java Arrays Java Command Line Arguments Java strictfp Keyword Java Math

Java Strings

Java Strings Java String Methods StringBuilder in Java StringBuffer in Java Java Regular Expressions StringBuffer vs StringBuilder String vs StringBuffer String vs StringBuilder String Manipulation in Java Java String Concatenation How to Reverse a String in Java String Array in Java How to Compare Two Strings in Java How to Concatenate Two Strings in Java Why String in Immutable in Java java.lang.NumberFormatException for Input String String Pool in Java Java Generate Random String How to take String Input in Java Java String Interview Questions

Java Exceptions

Exception Handling in Java Java try catch Java throw Java throws Difference between throw and throws Java finally Java Custom Exception Java Exception Propagation

Garbage Collection

Automatic Resource Management in Java Java Garbage Collection Java finalize() Java gc() Difference between final, finally and finalize


Multithreading in Java Process and Thread in Java Basic Terms in Multithreading Java Thread creation Thread Scheduler in Java Java Thread class DeadLock in Java

Java IO

Java IO Java Read File Java BufferedWriter Java InputStreamReader Java File Java Read File Line By Line Java FileOutputStream Jar File in Java


Java Serialization Java transient


Java Network Programming Java Socket Programming Java URL Java URLConnection HttpURLConnection in Java Java InetAddress Java DatagramSocket and Java DatagramPacket


Java AWT


Swing in Java

Java Collections

Collections in Java Java List Interface ArrayList in Java LinkedList in Java Vector in Java Stack in Java ArrayList vs LinkedList in Java ArrayList vs Vector in Java Java Set Interface HashSet in Java LinkedHashSet in Java TreeSet in Java Java Queue Interface PriorityQueue in Java ArrayDeque in Java Java Map Interface HashMap in Java LinkedHashMap in Java TreeMap in Java Dictionary in Java Hashtable in Java Properties in Java Collections class in Java Java Comparable Java Comparator Comparable vs Comparator in Java

Java Generics

Generics in Java

Java Annotations

Annotations in Java


Java JDBC Tutorial

Java Differences

Java vs JavaScript Python vs Java Kotlin vs Java Java vs C++ C# vs Java Static vs Non-static in Java C vs Java int vs Integer in Java Stack vs Heap in Java Java Array vs ArrayList

How to

How to run Java program How to set path in Java How to check the Java version in cmd How to install Java in Windows 10 How to run Java program in cmd How to call a method in Java How to sort an array in Java How to iterate HashMap in Java How to write Java program How to create an array in Java How to create a package in Java How to generate random numbers in Java How to input String in Java How to create thread in Java How to find length of String in Java How to sort a string in Java How to use scanner in Java How to achieve multiple inheritance in Java How to run Java program in Eclipse How to call a function in Java How to create array of objects in Java How to create custom exception in Java How to achieve abstraction in Java How to call static method in Java

Java 8 Features

Java 8 Features Lambda Expressions in Java Functional Interface in Java Streams in Java Java Base64 Encoding and Decoding Parallel Arrays Sort in Java

Java 9 Features

Java 9 Tutorial Java 9 Try With Resources Java 9 Interface Private Method

Java Servlet Tutorial

Java Servlets Tutorial

Java JSP Tutorial

Java JSP Tutorial

Hibernate Tutorial

Hibernate Tutorial

Spring Tutorial

Spring Tutorial

Spring MVC Tutorial

Spring MVC Tutorial

Jenkins Tutorial

Jenkins Tutorial

Java Math Methods

Math.abs() Math.acos() Math.addExact() Math.asin() Math.atan () Math.atan2() Math.cbrt() Math.ceil() Math.copysign() Math.cos() Math.cosh() Math.decrementExact() Math.exp() Math.expm1() Math.floor() Math.floorDiv() Math.floorMod() Math.getExponent() Math.hypot() Math.IEEEremainder() Math.incrementExact() Math.log() Math.log10() Math.log1p() Math.max() Math.min() Math.multiplyExact() Math.multiplyFull() Math.negateExact() Math.nextAfter() Math.nextDown() Math.nextUp() Math.pow() Math.random() Math.rint() Math.round() Math.scalb() Math.signum() Math.sin() Math.sinh() Math.sqrt() Math.subtractExact() Math.tan() Math.tanh() Math.toDegrees() Math.toIntExact() Math.toRadians() Math.ulp()

Java String Methods

toCharArray() copyValueOf() endsWith() equals() equalsIgnoreCase() format() getBytes() getChars() hashCode() indexOf() intern() isEmpty() join() lastIndexOf() length() replace() replaceAll() replaceFirst() split() startsWith() subSequence() substring() toLowerCase() toUpperCase() trim() valueOf()

Java Conversion

Java Convert String to int Java Convert int to String Java Convert String to long Java Convert long to String Java Convert String to float Java Convert float to String Java Convert String to double Java Convert double to String Java Convert String to Date Java Convert Date to String Java Convert String to Object Java Convert Object to String Java Convert String to char Java Convert char to String Java Convert int to long Java Convert long to int


Functional Interfaces in Java Singleton class in Java Awesome explanation of Strings in Java Object class in Java Static class in Java All the important string methods in Java String Handling Method in Java What are Array strings in Java Advantages and Disadvantages of Strings in Java Big Decimal class in Java Class definition in Java Char and String differences in Java Difference between String, StringBuffer and StringBuilder in java Replace character in string Java String Coding Interview Questions in Java What is String in Java? String isnullorempty in Java String Matches in Java Trim Method in String Java Bean class in Java Libraries in Java Arithmetic Operations on String in Java

Advantages and Disadvantages of Strings in Java

What is a String?

  • Java is an object-oriented, platform-independent, high-level, general-purpose, and interpreted programming language.
  • Sun Microsystems is known as the founder of java in 1991; the Java programming language was developed by him.
  • Green Team was the group of people who developed Java.
  • Sun Microsystems named the language OAK, but it changed to Java.
  • In 1995, the programming language named OAK was renamed Java.
  • Sun Microsystems has been acquired in 2009 by Oracle Corporation.
  • Since that Java is an Oracle-owned product.
  • The principal and sole goal behind developing this language were to develop programs for the devices which were handheld.

Advantages of Strings in Java

  • String offers us a string library to generate string objects, allowing us to dynamically generate strings and address boundary concerns within the class library.
  • Strings in the C programming language can be allocated and sized at compile time. As a result, they are more efficient and have a shorter run-time when in use.
  • We don't need to pre-define the length of a string in C++.
  • Many data structures, such as tries, suffix trees, suffix arrays, ternary search trees, and others, use strings as a base.
  • The string contains a string library for creating string objects, allowing strings to be dynamically allocated and addressing boundary issues inside the class library.
  • Strings give us extremely useful string algorithms for tackling extremely complicated issues in a shorter amount of time.
  • String provides us many types of inbuilt functions under string library such as sort(), substr(i, j), compare(), push_back() and many more.


  • Compilation generates a one-of-a-kind string. The string is rectified as far as possible during compilation. This involves the use of a combination operator as well as the conversion of other literals to strings. As a result, "Hi7" and ("Hi" +7) are the same objects in the class string set, having been completed at the same time. The capacity of compilers to attain this precision varies. You can always examine your compiler (for example, by decompiling numerous combined statements) and make changes if necessary.
  • Strings are stored in a char array with an offset index in JDK (actually starting offset and a number of characters). This fundamental structure is unlikely to change in any future Java version.
  • Substring operations do not need to duplicate the whole sequence of the underlying character because string objects have not been changed. Substrings can instead use the same char array as the original one and just refer to the char array's initial point and distinct ends. This means that substring operations are systematic in terms of memory usage and conservation; an additional object is simply a wrapper around the underlying Char Array with a separate array address.
  • Strings can refer to the same char array used by StringBuffer because of their close relationship. It's a double-edged sword, to be sure. This works well in general when using StringBuffer to manipulate and add characters and data types, then converting the final results to the string. StringBuffer is a useful tool for manipulating strings in a variety of ways, including growing, inserting, adding, changing, and more.
  • Without copying additional characters, the resulting string systematically refers to the same char array. It's quick and avoids using intermediary objects to keep the number of objects used to a minimum. If the StringBuffer object is then modified, the Array Char in the StringBuffer is transferred into the new char array that the StringBuffer now refers to. The previously distributed Array char is still referenced by String objects.
  • As a result, copying overhead can occur at any time during the application. Instead of the normal copying that occurs during the call to the tostring method (), the following update from the StringBuffer causes the newly generated char array to be copied. You can manually execute multiple copying techniques, such as StringBuffer, to make overhead copying happen at a predictable time. amount of time (). This allows StringBuffer to reuse data with more consistency.

Disadvantages of String in Java

  • Strings are notoriously slow when it comes to operations like input and output.
  • In JAVA, you can't enlarge the string class, which means you can't override its methods.
  • C strings are not dynamic and have a set size.
  • In JAVA, strings are  immutable means we cannot modify or change the strings


  • If you can't bend strings, you won't be able to add behavior to them for your own purposes.
  • As a result of the preceding points, all access must travel through a limited set of the current string method, resulting in additional overhead.
  • In terms of strings, the only option to increase the number of methods that allow efficient and effective string character artifices is to copy that particular character into your own array and modify it directly, which imposes additional steps and objects that you may not require.
  • Direct processing of Array Char is faster.
  • StringBuffer's strict clutch can result in unexpectedly large memory use. The underlying array presently holds the string created by StringBuffer.tostring (), regardless of the array's size (i.e., StringBuffer capacity). A StringBuffer with a capacity of 10,000 characters, for example, can create a string of ten characters. String 10 characters, on the other hand, continues to hold 10 characters in a 10,000-char array. If the StringBuffer is now used to generate a string of ten more characters, it first builds a new internal buffer of ten characters.