Reverse String in Java()

Step 1: Start a Java Project

Initiate a Java project. After that, let's now build a function named reverseString which will take a string parameter.

public class Main {
    public static void main(String[] args) {    
    }
    public static String reverseString(String str){
    
    }
}

After the function has been declared, the next step is to implement the code block to reverse the string.

Step 2: Implement String Reversal

Inside the reverseString function, you can create an empty String and concatenate characters from the original string one by one from end to start.

public static String reverseString(String str){
    String reversed = "";
    for(int i = str.length() - 1; i >= 0; i--){
        reversed += str.charAt(i);
    }
    return reversed;
}

Step 3: Test the function

Now we call the function with a string parameter and print the result.

public static void main(String[] args) {
    String original = "Hello World";
    String reversed = reverseString(original);
    System.out.println(reversed);
}

Step 4: Review the Code

Review the entire code to ensure all components are aligned correctly and serving their purpose. If any error is found, troubleshoot and rectify accordingly.

Step 5: Conclusion

This straightforward Java method allows us to reverse a given string. It's crucial to test your function with various sample inputs to ensure it's working as expected.

public class Main {
    public static void main(String[] args) {
        String original = "Hello World";
        String reversed = reverseString(original);
        System.out.println(reversed);
    }
    
    public static String reverseString(String str){
        String reversed = "";
        for(int i = str.length() - 1; i >= 0; i--){
            reversed += str.charAt(i);
        }
        return reversed;
    }
}