Full Stack Web Development Internship Program
- 29k Enrolled Learners
- Weekend/Weekday
- Live Class
Java offers a lot of methods to ease down your work. In this article, let’s discuss one such method, append(). The append method in java appends the specified string to the character sequence. Let me elaborate on the method append in Java.
The points to be discussed are as follows:
The method append in Java helps in appending the specified string to the character sequence. The characters of the string argument are then appended.
The declaration of the append method is as follows:
public StringBuilder append(String str)
str: It’s a string
Returns a reference to the object
Now that you are aware of the general syntax, let’s check out different ways/forms in which the method append in Java can be used.
Different ways to represent the append method are:
Now that you are aware of the concept, let’s try to understand the concept with the help of an example.
Below given code shows you the usage of StringBuilder class. Have a look!
Code:
import java.util.*; import java.util.concurrent.LinkedBlockingQueue; public class A { public static void main(String[] argv) throws Exception { StringBuilder str = new StringBuilder(); str.append("ABC"); System.out.println("String = " + str.toString()); StringBuilder str1 = new StringBuilder("XYZ"); System.out.println("String1 = " + str1.toString()); StringBuilder str2 = new StringBuilder(10); // print string System.out.println("String2 capacity = " + str2.capacity()); StringBuilder str3 = new StringBuilder(str1); // print string System.out.println("String3 = " + str3.toString()); } }
Output:
String = ABC
String1 = XYZ
String2 capacity = 10
String3 = XYZ
Another way out is by using StringBuffer class.
Code:
import java.io.*; class GFG { public static void main(String[] args) { StringBuffer s = new StringBuffer("GeeksforGeeks"); int p = s.length(); int q = s.capacity(); System.out.println("Length of the string Edureka =" + p); System.out.println("Capacity of the string Edureka =" + q); } }
Output:
Length of the string Edureka = 7
Capacity of the string Edureka = 10
In the above code, I have mentioned the two most used methods belonging to the StringBuffer class. Let me pour a little bit more information about this method that Java offers!
Well, the situation where + operator is used on string objects. Java by itself changes any modifications done to a string instance in two similar operations on a StringBuffer instance. Therefore concatenation invokes the append method on a StringBuffer object. As soon as the concatenation is performed the compiler calls the toString method to change the modified StringBuffer back into a constant string. It sounds really complex, right?
Well instead of all this why not just have one string class that acts like StringBuffer?
The solution here is performance. There are a lot of optimizations that the hour and time can make knowing that string objects are immutable. Java hides the complex part of conversion between String and StringBuffer, more precisely the programmers never really feel the need to use StringBuffer and will be able to solve most of the problems in terms of the + operator on string variables!
This brings us to the end of this article on method Append in Java. I hope you found it informative. Keep reading, keep exploring!
Check out the Java Training by Edureka, a trusted online learning company with a network of more than 250,000 satisfied learners spread across the globe. We are here to help you with every step on your journey, for becoming a besides this java interview questions, we come up with a curriculum which is designed for students and professionals who want to be a Java Developer.
Got a question for us? Please mention it in the comments section of this “Append in Java” article and we will get back to you as soon as possible.
Course Name | Date | Details |
---|---|---|
Java Course Online | Class Starts on 12th October,2024 12th October SAT&SUN (Weekend Batch) | View Details |
Java Course Online | Class Starts on 14th December,2024 14th December SAT&SUN (Weekend Batch) | View Details |
edureka.co