bath.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 59 行

//: c06:Bath.java
// Constructor initialization with composition.
import com.bruceeckel.simpletest.*;

class Soap {
  private String s;
  Soap() {
    System.out.println("Soap()");
    s = new String("Constructed");
  }
  public String toString() { return s; }
}

public class Bath {
  private String 
    // Initializing at point of definition:
    s1 = new String("Happy"), 
    s2 = "Happy", 
    s3, s4;
  Soap castille;
  int i;
  float toy;
  Bath() {
    System.out.println("Inside Bath()");
    s3 = new String("Joy");
    i = 47;
    toy = 3.14f;
    castille = new Soap();
  }
  void print() {
    // Delayed initialization:
    if(s4 == null)
      s4 = new String("Joy");
    System.out.println("s1 = " + s1);
    System.out.println("s2 = " + s2);
    System.out.println("s3 = " + s3);
    System.out.println("s4 = " + s4);
    System.out.println("i = " + i);
    System.out.println("toy = " + toy);
    System.out.println("castille = " + castille);
  }
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("Bath");
    Bath b = new Bath();
    b.print();
    monitor.expect(new String[] {
      "Inside Bath()",
      "Soap()",
      "s1 = Happy",
      "s2 = Happy",
      "s3 = Joy",
      "s4 = Joy",
      "i = 47",
      "toy = 3.14",
      "castille = Constructed"
    });
  }
} ///:~