INHERITANCE : JAVA Programming by "Gopal Krishna"

single Level :

class xyz
{
public void disp()
{
System.out.println("Hello ji");
}
}

class xyz1 extends xyz
{
public void disp1()
{
System.out.println("kya haal chaal");
}
}

class guru 
{
public static void main(String arg[])
{
xyz1 x=new xyz1();
x.disp();
x.disp1();
}
}

Multi. Level: 

class xy

{

public void disp2()

{

System.out.println("Hii ...");

}

}

class xyz extends xy

{

public void disp()

{

System.out.println("Hello ji");

}

}

class xyz1 extends xyz

{

public void disp1()

{

System.out.println("kya haal chaal");

}

}

class guru 

{

public static void main(String arg[])

{

xyz1 x=new xyz1();

x.disp();

x.disp1();

x.disp2();

}

}

Herarical :

class a

{

public void disp()

{

System.out.println("Hii ...");

}

}

class b extends a

{

public void disp1()

{

System.out.println("Hello ji");

}

}

class c extends b

{

public void disp2()

{

System.out.println("kya haal chaal");

}

}

class d extends b

{

public void disp3()

{

System.out.println("i am hacker");

}

}

class e extends c

{

public void disp4()

{

System.out.println("are saccchii me yaar");

}

}

class f extends d

{

public void disp5()

{

System.out.println("he haa haaa haaaaa");

}

}

class guru 

{

public static void main(String arg[])

{

e x=new e();

f y=new f();

x.disp();

x.disp1();

x.disp2();

y.disp3();

x.disp4();

y.disp5();

}

}