While calling a constructor from another constructor in a class using this keyword, the call should be
Question
While calling a constructor from another constructor in a class using this keyword, the call should be
Solution
When calling a constructor from another constructor in a class using the "this" keyword, the call should be the first statement in the constructor.
Here's a step-by-step explanation:
-
Define the class: In Java, you start by defining the class. For example,
public class MyClass. -
Define the constructors: Inside the class, you define the constructors. A constructor in Java is a block of code similar to a method that's called when an instance of an object is created.
-
Use the "this" keyword: If you want to call a constructor from another constructor, you use the "this" keyword. The "this" keyword refers to the current object in a method or constructor.
-
Make the call the first statement: The call to "this" should be the first statement in the constructor. If it's not, the Java compiler will show a compile-time error.
Here's an example:
public class MyClass {
int a;
int b;
// Default constructor
MyClass() {
this(10, 20);
System.out.println("Inside default constructor \n");
}
// Parameterized constructor
MyClass(int a, int b) {
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