Call one constructor from other constructors in the same class
2 answers
in java it is also possible with the keyword this
. check the example below.
public class A {
public A() {
//this("a");
System.out.println("inside default Constructor");
}
public A(String a){
this();
System.out.println("inside Constructor A");
}
}
This concept is called constructor chaining . If this is C # I found this saying it is possible Are nested constructors (or factory methods) good, or each should do all init
+4
This example from MSDN clarifies it
To add delegating constructors, the syntax is used constructor (. . .) : constructor (. . .)
.
class class_a {
public:
class_a() {}
// member initialization here, no delegate
class_a(string str) : m_string{ str } {}
// can’t do member initialization here
// error C3511: a call to a delegating constructor shall be the only member-initializer
class_a(string str, double dbl) : class_a(str) , m_double{ dbl } {}
// only member assignment
class_a(string str, double dbl) : class_a(str) { m_double = dbl; }
double m_double{ 1.0 };
string m_string;
};
Read answers Is it possible to call a constructor from another constructor (constructor chaining) in C ++? also.
+1
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