Save your programming time with string array in java

Java is an object-oriented language that can manage server-side functionalities and projects. People find the JAVA difficult because it requires multiple lines of code to run programs in an efficient manner. String functions have reduced the difficulty of code, with the use of string array in java you can develop the desktop application, mobile application, gaming application, efficiently.

In the field of programming, the string is defined as a data type to represent the text. If the no. are defined inside the string datatype, are also treated as the text. Java array of strings are a type of libraries, used to manage the functionality and programming purposes. There is some other data type also that holds the data in a different manner.

To manage the programming tasks in an efficient manner, you can use some predefined and standard formats to use the strings.

Using Java string libraries, you can perform the operations and processes on java variables, you have heard about arrays that contain a similar type of values in one-dimensional, two-dimensional, and multi-dimensional. String array in java can do the same work. You can declare and manipulate the Java array in different string formats:

3 ways to declare Java array of strings

Read about the three basic ways of a string array.

String Array

When we store the value in the class of array, we use the brackets for the simple dimensional formation. You have the option to position the bracket at two places according to the convenience in any of the events you don’t have to go through of any failure. No compilation error will be encountered during the execution.

Below we are defining the two ways of the single-dimensional string array:

String TestArray[ ];

String [ ] TestArray;

In the above string array declaration, we have not initialized the size and value of any variable.

String Array and initialization

List and array both are used to arrange the values of similar type of data that creates confusion among the people. You can differentiate and understand the way of array and list likewise, we fix the size of the array at the initial stage but while declaring a list you have the option to control it even at the running time and change the size too. 

As it’s a string array, so you can not change the size of the string to change the size of the array you have to declare a new array.

String[ ] TestArray=newTestArray[5];

Here 5 is a size of the given array, it will be fixed throughout the end of the lifecycle any variable or object. At any stage, if you want to increase the size of the array, doo the same as it is defined below:

 String[ ] TestArray=newTestArray[5];

TestArray=new String[10];

After performing this step, the values will be overwritten and changed the size of the array from 5 to 10, at the compilation time, the execution will be based on the value that has declared just before the print statement.

String[ ] TestArray=new string[5];

TestArray[0]= “Testing”;

TestArray=new String[10];


Below you can display the individual array content through the square brackets:

String[ ] TestArray=newTestArray[3];

TestArray[0]= “Hello”

TestArray[1]= “World”

TestArray[2]= “Thistime”

When we define the size of the array, the initial count starts from 0 and the ending point is defined as n-1. To define the size of the array you should also enter the positive number, in case you have entered the negative number, it will show the error.

String[ ] TestArray=newTestArray[3];

TestArray[-1]= “World”

In the other scenario, if you enter the size of the array greater than the maximum number of the index, it will again show the error.

String Array and Initial Value

You can declare the value of an array element at the initial stage, such values are known as the initial value. Below you can see the initialization of the array element:

String vehicleArray[ ]={“Hyundai”, “Honda”, “Audi”};

If the values are initialized, at the time of array declaration, no need to mention the size of the array as it is justified. The count order will be the same as before, which is 0 to n-1. Here, 

Hyundai is indexed at 0

Honda is indexed at 1

Audi is indexed at 2

All the three ways of string Array declaration are mentioned in the post, string arrays performed differently for different cases. You can extend and compressed the list elements according to your choice, but in the array, you have to set the size or you can say a limit to be fixed for the array element.

You can perform many tasks by operating loops, and statements, you can apply, while loop, do… while loop, or can try the if statement, if…else statement, nested if..elese statement.

String Class Functions

In Java, to make the programming projects easier string class functions are introduced. String Class Objects can easily access such class functions. These functions are called in two manners. 

  • Arguments passed and returned the value.
  • Arguments passed and do not return any value.

Below we are defining a few predefined functions and also the purpose of the functions.

String Concatenation

String concatenation is an important function that is applied to the two strings. String function is defined as follow:

string.concat(String object)

The result will be produced according to the string object.

String Length

If the string data is long and you don’t know the exact value or length of the string. Then str.length() will show the exact result, for this, there is no requirement to pass any argument inside the function. Just passing the name of the object you will get the result.

Comparison of String

A comparison of the two strings is possible in Java. It doesn’t matter whether these two strings have stored the same values or not, the method will be applicable in both cases. You will get the result in binary format so the result either be 0 or 1.

To compare two strings, the following syntax will be used:


To pass the argument inside the function you have the choice between String and String Object.

LowerCase To Uppercase

Looking for a way, so you can change the case of the literals, then Java has introduced a function, the literals will be changed into uppercase and lowercase, these two are the predefined function to change the cases: str.toLowerCase and str.toUpperCase.

The Method Ends With 

It is also possible to check the ending point of any string value, by applying this specific function or we can say that this method allows you to identify the suffix of the string value, if the suffix is presented in the string, the string function result will be true otherwise it will result false.

Strings are considered as one of the most useful things that you can use anytime to manage the workflow of the programs, in this post, we have mentioned a few functions, but the string function list is longer, you can find it over the web. It can be called directly and will make the task easier for you.

When you will start practicing on Java code on a daily basis you will be familiar with the string array in JAVA, reading the codes can’t make you a programmer, rectifying the errors, working on errors and codes will make you a better programmer.

About Shilpa Gupta 27 Articles
I am a person who is positive about every aspect of life.I have always been an achiever be it academics or professional life. I believe in success through hard work & dedication.

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