Aug 08, 2018 
896.9k
27
DecChristmas Special : Upto 40% OFF! + 2 free courses - SCHEDULE CALL
- Java Blogs -
Java is an object-oriented programming language used to write robust and secure apps for businesses. Today, this is taken as the most demanding programming platforms available so far and highly secure too that is considered as the primary requirement for businesses. At the same time, the aspiring minds looking for a career in Java should have depth understand of each of the OOPs concepts and basic programming syntax. Here, we will focus on two most popular functions i.e. Array. length Keyword and String.length() Function and how are they different in Java.
Let us dive deep into the topics with a basic introduction to variable and the function ahead ….
A Java array can hold an arbitrary number of elements and it depends on how the array object is created? If one wants to perform any operation on array then he must know the length of an array, like in case if you want to sort the numbers that are stored in an array, then he must know the length of the array in order to execute the for loop for full array length.
String.legth () is a function in Java that is used to know the length of String. It returns the number of characters that are stored in the String Variable. It returns the length of the String that is equal to the number of 16-bit Unicode String characters.
This article will help you know about these two Java keywords and after reading the post you will come to know about differences in both of them. The keywords are discussed with examples to make you clear about both of them.
As we have stated in the above-section that a Java array can hold any number of elements, so to perform any function on Array object you may need to identify the length of Java array. A Java object does not have length method, while arrays in Java have the final length field that contains the total number of characters, stored in that particular array. To execute any code on the arrays, you must know the length of that particular array. The syntax to know the length of an array is given below:
Read: A comprehensive guide for Java Developers Roles and Responsibilities | Updated!
Var=arrayname.length
The variable of an array will return a numeric value, equal to the number of characters that are stored in that array.
An Example to Use the Array Length is given below –
/* To Store the Length of Array */
public class JavaArrayLength
{
public static void main(String args[])
String[] fruitArray={“Apple, Guava, Banana”};
int arrayLength = fruitArray.length;
System.out.println(“The length of Array is + ”, arrayLength);
}
}The expected output of the above program is: 3
Here, in this code, the array length will be retrieved from the array. length variable that is of numeric type. As here the array has a pre-specified number of elements, so the length of the array is known, but in case if the array length will not be known then, in that case, the length has to be determined or retrieved. It can be done with the help of following code:
/* To find highest value element from array */
public class javaArrayHighValue{
private static int highValue(int[] anArray){
int highValue = anArray[0];
int arrayLength = anArray.length;
for (int i=1; i< - arrayLength -1; i++){ int value = anArray[i]; if (value > highValue){
highValue=value;
}}
return highValue;
}
Public static void main(String[] args)
{
Int[] testArray={190, 150, 200, 67};
System.out.println(“The maximum value is: ” +maxValue(testArray));
}
}In Java, String class has a function that is known as String length that is used to know the length of the String that is stored in the string array. Here the string that has the length of 16-bit Unicode can be identified by the function and displayed as the length of String array. The Syntax of the String object to know the length of its array is:
Read: Java ArrayList: What It Is & How To Create An Arraylist In Java
Public int length ()
No parameter is to be assigned in this function and it returns the length as an integer value. You can understand the use of String.length function of Java with the help of the following program:
Public class String_lengthex{
Public static void main(String[] args){
String S1=”This is a new Program”;
String S2=”TestProgram”:
Int stlength=S1.length();
System.out.println(“Length of First String is: ” + stlength);
System.out.println(“Length of another string is: ” + S2.length());
}
}The Output of the above program will be:
Length of First String is 21 Length of another string is: 11
In this way, string length function is used to know the total number of characters that are stored in the array. The length function of String class is an inbuilt function that returns an integer value. We can say that user need not write a separate function to know the String array length, just be using the built-in function it can be easily identified and used for programs.
You might be well familiar with both of these Java keywords. Here we are going to point out the specific differences between both of these keywords so that you do not get confused:
Read: Top 51+ Simple Java Project Ideas for Beginners In 2025
Length: It is used to calculate the array size as shown in the above program. You may use length keyword along with array to know the length of an array. They are one of the earliest Java primitives. It is a final public field. Being an immutable field user cannot access the field normally.
Length (): This String function is used to know that length of the String array.
In Java, there are total three keywords to know the array size. One is length that is used with Arrays, other is the length () that is used with Strings and one more is the size () that is used with ArrayList:
Related Post
Here, we can say that Array has the length variable that can be used to determine the length of an array, while length function is used with the String class object that can be used to determine the String length. Array variables are mutable, that is once the size of these variables is declared it can be changed during the program or code, while String objects are immutable that means once declared they cannot be modified. In case, if you will modify the String objects, then you will have to create the new one and the older one will not be modified.
Read: Hibernate Interview Questions And Answers
FaceBook
Twitter
LinkedIn
Pinterest
Email
A dynamic, highly professional, and a global online training course provider committed to propelling the next generation of technology learners with a whole new way of training experience.
Cyber Security
QA
Salesforce
Business Analyst
MS SQL Server
Data Science
DevOps
Hadoop
Python
Artificial Intelligence
Machine Learning
Tableau
Search Posts
Related Posts
Java Programmer Resume Template Sample - Guide for Fresher & Experienced
587.6k
Get Splunk Certifications – Meet Industry Standards & Propel Career Growth
6.3k
Free Jquery SLider Carousal Plugin
118.5k
Java ArrayList: What It Is & How To Create An Arraylist In Java
990.6k
What is the Future Scope of Java Developer & Programmer
180.9k
Receive Latest Materials and Offers on Java Course
Interviews
Aug 23, 2024
587.6k
