Summary of Session 8- Working with Java Strings | String Methods | Java & Selenium | 2024 New series

Summary of Video: "Session 8- Working with Java Strings | String Methods | Java & Selenium | 2024 New series"

In this session, the speaker discusses the importance of strings in Java and the various built-in methods available for String manipulation. The session aims to familiarize viewers with key String methods that are frequently used in Programming and automation tasks.

Main Ideas and Concepts:

• String Basics:
  • Strings are a fundamental data type in Java, represented by the String class, which includes various built-in methods.
  • There are two types of methods in Java: built-in methods (provided by Java) and user-defined/custom methods.
• Common String Methods:
  • Length: s.length() returns the number of characters in the String.
  • Concatenation: Strings can be concatenated using the + operator or the s.concat(t) method.
  • Trim: s.trim() removes leading and trailing whitespace from the String.
  • Character Retrieval: s.charAt(index) returns the character at the specified index.
  • Contains: s.contains(substring) checks if the String contains a specified substring and returns a boolean.
  • Comparison:
    • s1.equals(s2) compares two strings for equality (case-sensitive).
    • s1.equalsIgnoreCase(s2) compares two strings for equality without considering case.
  • Replace: s.replace(oldChar, newChar) replaces all occurrences of a specified character or substring with another character or substring.
  • Substring: s.substring(startIndex, endIndex) extracts a part of the String based on the specified index range.
  • Case Conversion: s.toUpperCase() and s.toLowerCase() convert the String to uppercase or lowercase, respectively.
  • Split: s.split(delimiter) splits the String into an array based on the specified delimiter.

Detailed Methodology:

• Finding Length: Use s.length() to get the number of characters in the String.
• Concatenation: Use either s1 + s2 or s1.concat(s2) to join strings.
• Trimming Whitespace: Call s.trim() to remove spaces from both ends of the String.
• Extracting Characters: Use s.charAt(index) to get a character at a specific index.
• Checking Substring Presence: Use s.contains(substring) to check if a substring exists within the String.
• String Comparison: Use s1.equals(s2) for case-sensitive comparison and s1.equalsIgnoreCase(s2) for case-insensitive comparison.
• Replacing Characters: Use s.replace(oldChar, newChar) to replace characters or substrings.
• Extracting Substrings: Use s.substring(startIndex, endIndex) to extract a portion of the String.
• Changing Case: Use s.toUpperCase() or s.toLowerCase() to convert the case of the String.
• Splitting Strings: Use s.split(delimiter) to divide the String into parts based on a specified delimiter.

Conclusion:

The session emphasizes the practical application of these String methods, especially in the context of Automation Testing with Java and Selenium. The speaker encourages practice and understanding of these methods, as they are crucial for effective Programming and automation tasks.

Speakers/Sources Featured:

The speaker is not explicitly named in the subtitles, but they provide instruction on Java String methods as part of a series on Java and Selenium Programming.

Notable Quotes

— 00:00 — « No notable quotes »

Category

Educational

Video