contoh membuat warisan sederhana

package javaapplication5;
public class ilmu {
}
class mtk extends ilmu{
}
class falak extends mtk{
}
class inggris extends mtk{
}
class agama extends mtk{
}
class computer extends inggris{
}
class alat extends agama{
}
class fiqih extends agama{
}
class babusolat extends fiqih{
}
class babuhajji extends fiqih{
}
class nahwu extends alat{
}
class sorrof extends alat{
}
class pemograman extends computer{
}
class hardware extends computer{
}