objecttypetest.java

来自「JSF 演示代码」· Java 代码 · 共 33 行

/**
 *　通过这个程序，测试对象类型的多态实现
 */
public class ObjectTypeTest
{
	public static void main(String[] args)
	{
		B a = new B();
		a.method2();
	}
}

class A
{
	public void method1()
	{
		System.out.println("this is class A method1");
	}
}
	
class B extends A
{
	public void method1()
	{
		System.out.println("this is class B method1");
	}

	public void method2()
	{
		System.out.println("this is class B method2");
	}
}