Java Programming Interview Question | # 8 How do you remove spaces from a string in Java? смотреть онлайн

Code Link:
https://drive.google.com/file/d/19Oie3ZU44GjjcF8E8sn0KZVEYu8isrWD/view?usp=sharing


Code Explanation:

This Java code defines a class named `codime` that contains two methods for removing blank spaces from a given input string. It provides two different approaches for achieving this task:

1. **First Method (`firstMethod`):** This method uses the built-in `replaceAll` function from the `String` class to remove all occurrences of white space characters (spaces, tabs, etc.) in the input string. It employs a regular expression (`\\s`) to match any white space character and replaces it with an empty string. The result is a new string with all the blank spaces removed.

2. **Second Method (`secondMethod`):** This method utilizes a loop to iterate through each character in the input string. It checks if the character is a white space character using the `Character.isWhitespace(ch)` function. If the character is not a white space, it appends the character to the output string (`op`). This approach essentially constructs a new string by selectively adding non-blank characters from the input string.

The `main` function serves as the entry point of the program. In this function, both methods are demonstrated by calling them with different input strings containing various blank spaces. The results of both methods are then printed to the console.

Here's what the program does when executed:

1. It calls the `firstMethod` with the input string `" Blank Spaces "`. The method removes all the spaces and returns the string `"BlankSpaces"`.

2. It calls the `secondMethod` with the input string `" Blank Spaces "`. The method removes all the spaces and returns the string `"BlankSpaces"`.

Therefore, the output of the program will be:

```
BlankSpaces
BlankSpaces
```