Скачать или смотреть Concat Craft : Weaving Strings Together!

In Java, the concat() method is used to join two strings together. It appends the specified string to the end of the original string and returns a new concatenated string. For example, str1.concat(str2) combines str1 and str2 into a single string.

Timestamps
0:00 Introduction
0:22 Definition
0:34 Method Signature (Explanation: Parameter and Return value)
0:56 Usage Examples: Example 1 Basic Concatenation
1:53 Usage Examples: Example 2 Concatenation with a Space
2:47 Usage Examples: Example 3 Handling null
3:47 Use cases: Example 1 Combining Messages
4:59 Use cases: Example 2 Builing SQL queries
5:53 Thanks for Watching ( Link to previous and next video)