Reflection - Beginning Java 8 Language Features - page 79

Listing 3-1. A Bulb Class to Demonstrate Initialization of a Class
// Bulb.java
package com.jdojo.reflection;
public class Bulb {
static {
// This will execute when this class is loaded and initialized
System.out.println("Loading class Bulb...");
}
}
Listing 3-2. Testing Class Loading and Initialization
// BulbTest.java
package com.jdojo.reflection;
public class BulbTest {
public static void main(String[] args) {
/* Uncomment only one of the following statements at a time.
Observe the output to see the difference in the way the Bulb class
is loaded and initialized.
*/
BulbTest.createObject();
// BulbTest.forName();
// BulbTest.forNameVersion2();
// BulbTest.classLiteral();
}
public static void classLiteral() {
// Will load the class, but won't initialize in Java 5 and later.
// Prior version of Java will initialize the class too.
Class<Bulb> c = Bulb.class;
}
public static void forNameVersion2() {
try {
String className = "com.jdojo.reflection.Bulb";
boolean initialize = false;
// Get the classloader for the current class
ClassLoader cLoader = BulbTest.class.getClassLoader();
// Will load, but not initialize the class, because we have
// set the initialize variable to false
Class c = Class.forName(className, initialize, cLoader);
}
catch (ClassNotFoundException e) {
System.out.println(e.getMessage());
}
}