Mega Code Archive
Constructor initialization with composition
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// : c06:Bath.java
// Constructor initialization with composition.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
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;
private Soap castille;
private int i;
private float toy;
public Bath() {
System.out.println("Inside Bath()");
s3 = new String("Joy");
i = 47;
toy = 3.14f;
castille = new Soap();
}
public String toString() {
if (s4 == null) // Delayed initialization:
s4 = new String("Joy");
return "s1 = " + s1 + "\n" + "s2 = " + s2 + "\n" + "s3 = " + s3 + "\n"
+ "s4 = " + s4 + "\n" + "i = " + i + "\n" + "toy = " + toy
+ "\n" + "castille = " + castille;
}
public static void main(String[] args) {
Bath b = new Bath();
System.out.println(b);
}
} ///:~
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