出现如下错误是何原因？

[臭臭手抽抽]

package Test;

//Demonstrate static variables，methods，and blocks.

class UseStatic
{
	static int a = 3;
	static int b;

	static void meth(int x)
	{
		System.out.println("x = " + x);
		System.out.println("a = " + a);
		System.out.println("b = " + b);
	}

	static
	{
		System.out.println("Static block initialized.");
		b = a * 4;
	}

	public static void main(String args[])
	{
		meth(42);
	}
}

Caused by: java.lang.ClassNotFoundException: Test.Test5
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Exception in thread "main"

[袁慎建]

我猜楼主点击的是eclipse上面的run工具栏执行的吧，如果你用的是eclipse，在这个类的编辑界面，右击鼠标，Run As-->Java Application

[genganpeng]

楼上正解，如果右键找不到Run As-->Java Application,请改成public class UseStatic