47 lines
1.2 KiB
Java
47 lines
1.2 KiB
Java
// housekeeping/Flower.java
|
|
// (c)2021 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
// Calling constructors with "this"
|
|
|
|
public class Flower {
|
|
int petalCount = 0;
|
|
String s = "initial value";
|
|
Flower(int petals) {
|
|
petalCount = petals;
|
|
System.out.println(
|
|
"Constructor w/ int arg only, petalCount= "
|
|
+ petalCount);
|
|
}
|
|
Flower(String ss) {
|
|
System.out.println(
|
|
"Constructor w/ String arg only, s = " + ss);
|
|
s = ss;
|
|
}
|
|
Flower(String s, int petals) {
|
|
this(petals);
|
|
//- this(s); // Can't call two!
|
|
this.s = s; // Another use of "this"
|
|
System.out.println("String & int args");
|
|
}
|
|
Flower() {
|
|
this("hi", 47);
|
|
System.out.println("Zero-argument constructor");
|
|
}
|
|
void printPetalCount() {
|
|
//- this(11); // Not inside non-constructor!
|
|
System.out.println(
|
|
"petalCount = " + petalCount + " s = "+ s);
|
|
}
|
|
public static void main(String[] args) {
|
|
Flower x = new Flower();
|
|
x.printPetalCount();
|
|
}
|
|
}
|
|
/* Output:
|
|
Constructor w/ int arg only, petalCount= 47
|
|
String & int args
|
|
Zero-argument constructor
|
|
petalCount = 47 s = hi
|
|
*/
|