jurassic.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 28 行

//: c06:Jurassic.java
// Making an entire class final.
import com.bruceeckel.simpletest.*;

class SmallBrain {}

final class Dinosaur {
  int i = 7;
  int j = 1;
  SmallBrain x = new SmallBrain();
  void f() {}
}

//! class Further extends Dinosaur {}
// error: Cannot extend final class 'Dinosaur'

public class Jurassic {
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("Jurassic");
    Dinosaur n = new Dinosaur();
    n.f();
    n.i = 40;
    n.j++;
    monitor.expect(new String[] {
    });
  }
} ///:~