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Java String Programs Examples With Output

Last Updated : Feb 15, 2023

Java String Programs Examples With Output

In this article we will show you the solution of java string programs examples with output, strings in Java are essentially objects that represent lists of char values.

A character array functions similarly to a Java string.

Step By Step Guide On Java String Programs Examples With Output :-

In java, Text is stored using strings. The characters in a String variable are enclosed in double quotations.

Numerous methods, including compare(), concat(), equals(), split(), length(), replace(), compareTo(), intern(), and substring(), are available in the Java String class.

The Serializable, Comparable, and CharSequence interfaces are implemented by the java.lang.String class.

In Java, a string is essentially an object with methods that can manipulate strings in different ways.

A string is typically a collection of characters. String, however, refers to an object in Java that represents a series of characters. Java.lang is used. A string object is made using the String class.

There are two techniques for making a String object:

  1. Using a string literal
  2. By new keyword

1. String Literal:

Double quotes are used to produce a string literal in Java.

The "string constant pool" is checked first by the JVM whenever a string literal is created.

A reference to the pooled instance of the string is returned if it already exists. If the string is missing from the pool, a new instance of the string is produced and added to the pool.

2. By new keyword:

In such case, JVM will create a new string object in normal (non-pool) heap memory, and the literal "Welcome" will be placed in the string constant pool.

The variable s will refer to the object in a heap (non-pool).

Java String’s escape character

Some characters in a string can be escaped using the escape character. Let's say we need to add double quotes to a string.

Since double quotes are used to denote strings, the compiler will treat "This is the " as a string. As a result, the code above will result in an error.

In Java, we employ the escape character () to resolve this problem. Now, escape characters instruct the compiler to read the entire document without the double quotes.

Strings in Java are immutable.

Strings are immutable in Java. This means that once a string is created, it cannot be changed.

Creating strings using the new keyword

So far we have created strings like primitive types in Java. Since strings in Java are objects, we can create strings using the new keyword as well.

Create String using literals vs new keyword

Now that we know how strings are created using string literals and the new keyword, let's see what is the major difference between them.

In Java, the JVM maintains a string pool to store all of its strings inside the memory. The string pool helps in reusing the strings.

class Main {
  public static void main(String[] args) {
    String name = new String("Welcome to Talkerscode");
  1. Using the new keyword, we create Java Strings in this code.
  2. We start by using main class.
  3. Next, public static void main is used (string[] args)
  4. Next, a string is created using the new keyword.
  5. After that, we print that Java string using system.out.println.

Conclusion :-

As a result, we have successfully learned about the Java concept of a string.

Additionally, we demonstrate how to generate a string using a new keyword and its result.

I hope this article on java string programs examples with output helps you and the steps and method mentioned above are easy to follow and implement.

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