class WithFinals {
private final void f() {
System.out.println("WithFinals.f()");
}
// 类中所有的private方法都隐式指定是final
private void g() {
System.out.println("WithFinals.g()");
}
}
class OverridingPrivate extends WithFinals {
private final void f() {
System.out.println("OverridingPrivate.f()");
}
private final void g() {
System.out.println("OverridingPrivate.g()");
}
}
class OverridingPrivate2 extends OverridingPrivate {
public final void f() {
System.out.println("OverridingPrivate2.f()");
}
public final void g() {
System.out.println("OverridingPrivate2.g()");
}
}
public class FinalOverridingIllusion {
public static void main(String[] args) {
OverridingPrivate2 op2 = new OverridingPrivate2();
op2.f();
op2.g();
OverridingPrivate op = op2;
覆盖只有在某方法是基类的接口的一部分时才会出现（必须能将一个对象向上转型为它的基本类型并调用相同的方法）
// op.f();
// op.g();
}
}
final就是防止继承类修改它的含义
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