Task $1$: Working with String Methods

Create a new Java class called StringLab.

Inside the main$()$ method, create a String variable with the value $"$ Welcome to the Java String Lab! $".$

Use the following methods on this string and print the results:

length$()$: Print the length of the string.

charAt$()$: Print the character at index $7.$

substring$()$: Extract and print the word "Java" from the string.

toUpperCase$()$ and toLowerCase$()$: Print both the uppercase and lowercase versions of the string.

indexOf$()$: Find and print the index of the first occurrence of "Java".

contains$()$: Check if the string contains the word "Lab" and print the result.

replace$()$: Replace "Java" with "Java Programming" in the string and print the result.

split$()$: Split the string by spaces and print each word.

trim$()$: Trim any leading or trailing spaces and print the result.

equals$()$ and equalsIgnoreCase$()$: Compare the string "java string lab!" with $"$ Welcome to the Java String Lab! $"$ and print the results for both methods.

Task $2$: Working with StringBuilder

Create a new StringBuilder object initialized with the value "StringBuilder Lab".

Perform the following operations:

append$()$: Append the text $"-$ Learning Java" to the StringBuilder.

insert$()$: Insert the text $"$ is fun" after the word "Lab".

delete$()$: Delete the word "Learning" from the StringBuilder.

reverse$()$: Reverse the entire string and print it$.$

Task $3$: Working with StringBuffer

Create a new StringBuffer object initialized with the value "Multithreading Lab".

Perform the same operations as in Task $2($append$(),$ insert$(),$ delete$(),$ reverse$()).$