blankfinal.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 32 行

//: c06:BlankFinal.java
// "Blank" final data members.
import com.bruceeckel.simpletest.*;

class Poppet { 
  int i;
  public Poppet(int ii) { i = ii; }
}

public class BlankFinal {
  final int i = 0; // Initialized final
  final int j; // Blank final
  final Poppet p; // Blank final reference
  // Blank finals MUST be initialized
  // in the constructor:
  BlankFinal() {
    j = 1; // Initialize blank final
    p = new Poppet(1);
  }
  BlankFinal(int x) {
    j = x; // Initialize blank final
    p = new Poppet(x);
  }
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("BlankFinal");
    new BlankFinal();
    new BlankFinal(47);
    monitor.expect(new String[] {
    });
  }
} ///:~