/home/wpollock1/public_html/AJava/DIManual/Main.java
package com.wpollock.manualdidemo;
/**
* The calls to sayHello from main should all throw NullPointerException,
* since no GreetingService has been injected into any of these objects.
* In this demo, we are using (abusing actually) JUnit as the DI
* framework, so we need to run the controllers from a JUnit test and
* not from here.
*/
public class Main {
public static void main (String [] args) {
try {
PropInjectedController pic = new PropInjectedController();
pic.sayHello();
}
catch (NullPointerException npe) {
System.out.println("PropInjectedController sayHello threw NPE");
}
try {
SetterInjectedController sic = new SetterInjectedController();
sic.sayHello();
}
catch (NullPointerException npe) {
System.out.println("SetterInjectedController sayHello threw NPE");
}
try {
ConstructorInjectedController cic = new ConstructorInjectedController(null);
cic.sayHello();
}
catch (NullPointerException npe) {
System.out.println("ConstructorInjectedController sayHello threw NPE");
}
}
}