java----------测试对象类型的多态实现

/***//**
*通过这个程序，测试对象类型的多态实现
*/
publicclassObjectTypeTest...{
publicstaticvoidmain(String[]args)...{
Aa=newB();
a.method1();
}
}

classA...{
publicvoidmethod1()...{
System.out.println("thisisclassAmethod1");
}
}

classBextendsA...{
publicvoidmethod1()...{
System.out.println("thisisclassBmethod1");
}

publicvoidmethod2()...{
System.out.println("thisisclassBmethod2");
}
}