Difference Between This And This In Java
Comparing Two Objects in Java: Using 'this' and 'this'
Difference Between This And This In Java
In Java, “this” is a keyword that represents the current instance of a class, allowing you to refer to the current object's members within its own instance methods. On the other hand, “this()” is used to invoke another constructor within the same class, typically to reuse code when initializing an object with different sets of parameters. While “this” references the current object, “this()” calls another constructor within the same class.
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1 - In Java, “this” is a keyword that refers to the current instance of a class, while “this()” is a special keyword used to invoke a class constructor from another constructor in the same class.
2) When “this” is used, it is used to differentiate between instance variables and method parameters with the same name. It helps to access the instance variables of the current object.
3) On the other hand, “this()” is used to call another constructor in the same class. It allows for constructor chaining, which can help in reducing code duplication.
4) The keyword “this” can be used in instance methods and constructors, whereas the “this()” keyword can only be used within a constructor.
5) Using “this” can improve code readability and help avoid naming conflicts within a class.
6) “this” can also be used to invoke instance methods or access instance variables within the same class.
7) “this()” must be the first line in a constructor method when used to call another constructor within the same class.
8) Understanding the difference between “this” and “this()” is essential for Java developers to effectively manage object instances and constructors within their classes.
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