javastringsubstring

Java String Substring: A Brief Overview

Java is an object-oriented programming language widely used for developing web applications, server-side applications, and mobile applications. One of the fundamental features of Java programming is its String class. A string in Java is a sequence of characters. Java offers numerous methods to manipulate strings.

What is Java String Substring?

The Java String substring method is a widely used method to extract a part of a string. As the name suggests, substring extracts a part of a string starting from a specified index to another specified index. The syntax of the substring method is:

String substring(int startIndex, int endIndex)

The substring method takes two parameters - startIndex and endIndex. The startIndex is the index from where the extracting of the string will start, and the endIndex is the index where the extracting will stop. The substring method returns a new string containing the extracted characters.

Java String Substring Examples

To understand the substring method fully, let's take a look at some examples:

// Get the substring from index 2 to index 5
String str = "Hello World";
String substring = str.substring(2, 5);
System.out.println(substring); // Output: llo

In this example, we created a string "Hello World" and extracted the characters starting from index 2 and ending at index 5. The extracted string is "llo".

// Get the substring from index 0 to index 4
String str = "Hello World";
String substring = str.substring(0, 4);
System.out.println(substring); // Output: Hell

In this example, we extracted the first four characters of the string "Hello World". The extracted substring is "Hell".

The Java String substring method is a powerful tool to extract a part of string easily. It is widely used in Java programming for manipulating and manipulating strings. When using the Java substring method, it is essential to be cautious about the start and end indexes to avoid any index out of bounds exception.