parcel3.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 38 行

//: c08:Parcel3.java
// Returning a reference to an inner class.
import com.bruceeckel.simpletest.*;

public class Parcel3 {
  private class PContents implements Contents {
    private int i = 11;
    public int value() { return i; }
  }
  protected class PDestination
      implements Destination {
    private String label;
    private PDestination(String whereTo) {
      label = whereTo;
    }
    public String readLabel() { return label; }
  }
  public Destination dest(String s) {
    return new PDestination(s);
  }
  public Contents cont() { 
    return new PContents(); 
  }
}

class Test {
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("Test");
    Parcel3 p = new Parcel3();
    Contents c = p.cont();
    Destination d = p.dest("Tanzania");
    // Illegal -- can't access private class:
    //! Parcel3.PContents pc = p.new PContents();
    monitor.expect(new String[] {
    });
  }
} ///:~