How to call grandparent constructor with parameters in Java? -

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• jump on parent constructor call grandparent's 10 answers

maybe question have many people ask, still don't know how answer.

i have a, b, c class.

c extends b, b extends a.

the main method in c class.

if want call constructor method parameters in c class,

how can do?

thanks much.

a class

 public class {      public a() {         system.out.println("a construtor");     }      public a(int a, int b)     {         system.out.println("a.a:"+ + "/b.b:"+b);     }  } 

b class

 public class b extends a{     public b() {         system.out.println("b construtor");     }      public b(int a, int b) {         system.out.println("b.a:" + + "/b.b:" + b);     }  } 

c class

 public class c extends b{      public static void main(string[] str)     {         c c = new c();     }      public c() {  //     super(1,2);         // how call constructor parameters          system.out.println("c constructor");      }   } 

class c not explicitly extend class a, via class b c extends a, hence able access constructors of a, via constructors of class b.

by using super(1,2) in class c's constructor call class b's constructor has 2 int parameters. need change class b's arg constructor following:

public class b extends a{ public b() {     system.out.println("b construtor"); }  public b(int a, int b) { super(a,b);     system.out.println("b.a:" + + "/b.b:" + b); } 

}

bear in mind following:

1)when no constructor supplied class, java creates default non-arg constructor.

2)if class extends class b, class b requires constructor , superclasses must called @ first.