public class finalDemo {

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		final DemoA dA = new DemoA();

		DemoB dB = new DemoB();

		//dA = new DemoA;如果添加了final修饰，则dA不可以再修改dA的引用

		dA.TestA();

		dB.TestA();

	}

}

 /*final*/ class DemoA{//如果添加了final，则DemoB不可以继承DemoA

	public final int a = 1;

	public int b =2;

	public /*final*/ void TestA() {//如果添加了final，则DemoB里的TestA不可以重写DemoA里的TestA

		//a++;错误！因为final修饰的变量a即为常量，不可以被修改

		System.out.println(a);

	}

	public void TestB() {

		System.out.println(b);

	}

}

class DemoB extends DemoA{

	public int a = 1;

	public int b =2;

	public void TestA() {

		System.out.println(a);

	}

	public void TestB() {

		System.out.println(b);

	}

}