


Use java's StringBuilder.insert() function to insert a string at the specified position
Use java's StringBuilder.insert() function to insert a string at a specified position
StringBuilder is a class used to handle variable strings in Java. It provides a variety of methods to operate strings, among which The insert() function is one of the common methods used to insert a string at a specified position. In this article, we will introduce how to use the insert() function to insert a string at a specified position and give corresponding code examples.
The insert() function is defined as follows:
public StringBuilder insert(int index, String str)
Among them, the index parameter indicates the position where the string is to be inserted, and the str parameter indicates the string to be inserted.
The following is a sample code that uses the insert() function to insert a string at a specified position:
public class StringBuilderExample { public static void main(String[] args) { StringBuilder sb = new StringBuilder("Hello World!"); // 在指定位置插入字符串 sb.insert(6, "Java "); // 输出结果 System.out.println(sb.toString()); } }
Run the above code, the output result is:
Hello Java World!
You can see So, we successfully inserted the string "Java" into the 6th position of the original string "Hello World!" and got the new string "Hello Java World!".
In addition to inserting a string at a specified position, the insert() function can also insert a string at any position in the string. The following is a sample code that inserts a string at any position in the string:
public class StringBuilderExample { public static void main(String[] args) { StringBuilder sb = new StringBuilder("Hello World!"); // 在字符串的任意位置插入字符串 sb.insert(sb.indexOf("World"), "Java "); // 输出结果 System.out.println(sb.toString()); } }
Run the above code, the output result is:
Hello Java World!
As you can see, we use the indexOf() function Locate the position of the string "World" in the original string, insert the string "Java" at that position, and get the new string "Hello Java World!".
In short, using java's StringBuilder.insert() function can easily insert a string at a specified position or any position. Through the above example code, I believe that readers have mastered the basic method of using the insert() function and can flexibly apply it in actual development.
The above is the detailed content of Use java's StringBuilder.insert() function to insert a string at the specified position. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Guide to Square Root in Java. Here we discuss how Square Root works in Java with example and its code implementation respectively.

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Guide to the Armstrong Number in Java. Here we discuss an introduction to Armstrong's number in java along with some of the code.

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is
