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Message:

Call non-default ancestor's constructor from descendent constructor

Posted by Kishori Sharan on July 19, 2001 at 9:32 PM

When you inherit a class from other class then by default the java compiler puts a call to the default construtor of ancestor class. However, if in the construtor of descendent class you call constructor of ancestor then java compiler doesn't call the default construtor of ancestor. Therefore, in your case call the non-default construtor of class A from both the constructor of class B and everything will be OK. Here is your example.
///////// A.java
public class A{
String a ;
A(String a) {
this.a = a;
}

}

class B extends A {
B ( ) {
super ( "hello" ) ;
}
B ( int i ) {
super ( "hello" ) ;
}
}