Java Program to Iterate each Characters of String.

May 26, 2023

What is String in Java ?

In Java, the “String” data type is a class that represents a sequence of characters. It is used to store and manipulate text-based data. Unlike primitive data types, such as “int” or “float”, which hold a single value, a String object can hold multiple characters.

More on String in Java .

In Java, strings are immutable, which means that once a string object is created, it cannot be changed. Instead, any operation that modifies a string actually creates a new string object. This is why it’s important to be mindful of the performance implications when performing a lot of string operations.

Steps to Convert int to String :

Declare the string you want to iterate over.
Get the length of the string using the length() method.
Set up a loop to iterate over each character in the string, from index 0 to length – 1.
Inside the loop, use the charAt() method to get the character at the current index.
Do whatever operation you want on the current character.
Repeat steps 4-5 for each character in the string.
Exit the loop when all characters have been processed.

Here’s a pseudo-code of the algorithm :

// Step 1: Declare the string you want to iterate over.
string myString = "example";

// Step 2: Get the length of the string using the length() method.
int length = myString.length();

// Step 3: Set up a loop to iterate over each character in the string.
for (int i = 0; i < length; i++) {
    // Step 4: Use the charAt() method to get the character at the current index.
    char currentChar = myString.charAt(i);

    // Step 5: Do whatever operation you want on the current character.
    // For example, print it to the console.
    System.out.println(currentChar);
}

// Step 6: Repeat steps 4-5 for each character in the string.
// Step 7: Exit the loop when all characters have been processed.

Example 1 :

Run

public class Main {
    public static void main(String[] args) {
        String myString = "Prepinsta";

        int length = myString.length();

        for (int i = 0; i < length; i++) {
            char currentChar = myString.charAt(i);
            System.out.print(currentChar+" ");
        }
    }
}

Output :

P r e p i n s t a

Explanation : In this example, we declare a string myString and set it equal to "example". We then get the length of the string using the length() method, and use a for loop to iterate over each character in the string.

Example 2 :

Run

public class Main {
    public static void main(String[] args) {
        String myString = "PrepinstaPrime";

        char[] charArray = myString.toCharArray();
        int i = 0;

        while (i < charArray.length) {
            char currentChar = charArray[i];
            System.out.print(currentChar+" ");
            i++;
        }
    }
}

Output :

P r e p i n s t a P r i m e

Explanation : In this example, we declare a string myString and set it equal to "example". We then convert the string to a character array using the toCharArray() method, and declare a counter variable i and set it equal to 0.
We then set up a while loop to iterate over each character in the array. Inside the loop, we use the current value of i to access the current character in the array, and then print it to the console using System.out.print().

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Java Program to Iterate each Characters of String.

What is String in Java ?

More on String in Java .

Steps to Convert int to String :

Here’s a pseudo-code of the algorithm :

Example 1 :

Output :

Example 2 :

Output :

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Get over 200+ course One Subscription

Checkout list of all the video courses in PrepInsta Prime Subscription

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