关于《Thinking in Java》 类型信息的一个代码的疑问

class Initable {
  static final int staticFinal = 47;
  static final int staticFinal2 =ClassInitialization.rand.nextInt(1000);
  static {
    System.out.println("Initializing Initable");
  }
}
class Initable2 {
  static int staticNonFinal = 147;
  static {
    System.out.println("Initializing Initable2");
  }
}

class Initable3 {
  static int staticNonFinal = 74;
  static {
    System.out.println("Initializing Initable3");
  }
}

public class ClassInitialization {
  public static Random rand = new Random(47);
  public static void main(String[] args) throws Exception {
    Class initable = Initable.class;
    System.out.println("After creating Initable ref");
    // Does not trigger initialization:
    System.out.println(Initable.staticFinal);
    // Does trigger initialization:
    System.out.println(Initable.staticFinal2);
    // Does trigger initialization:
    System.out.println(Initable2.staticNonFinal);
    Class initable3 = Class.forName("Initable3");
    System.out.println("After creating Initable3 ref");
    System.out.println(Initable3.staticNonFinal);
  }
} 

运行结果报错：After creating Initable ref
47
Initializing Initable
258
Initializing Initable2
147
Exception in thread "main" java.lang.ClassNotFoundException: Initable3
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at aaaa.ClassInitialization.main(ClassInitialization.java:38)
为什么？为什么？ java 类型信息
[解决办法]
要加上包名：

package com.withiter.csdn.test;

import java.util.Random;

class Initable {
static final int staticFinal = 47;
static final int staticFinal2 = ClassInitialization.rand.nextInt(1000);
static {
System.out.println("Initializing Initable");
}
}

class Initable2 {
static int staticNonFinal = 147;
static {
System.out.println("Initializing Initable2");
}
}

class Initable3 {
static int staticNonFinal = 74;
static {
System.out.println("Initializing Initable3");
}
}

public class ClassInitialization {
public static Random rand = new Random(47);

public static void main(String[] args) throws Exception {
Class initable = Initable.class;
System.out.println("After creating Initable ref");
// Does not trigger initialization:
System.out.println(Initable.staticFinal);
// Does trigger initialization:
System.out.println(Initable.staticFinal2);
// Does trigger initialization:
System.out.println(Initable2.staticNonFinal);
Class initable3 = Class.forName("com.withiter.csdn.test.Initable3");
System.out.println("After creating Initable3 ref");
System.out.println(Initable3.staticNonFinal);
}
}

[解决办法]
class.forName(String)中的String要加全限定名的吧，你单独加的是这个类名JVM会找不到的。
你试试加包的名上去