我写的代码如下:package learning.study;
import java.util.regex.*;
class Application { /**
* @param args
*/
public static void main(String[] args) {
String Date="java Programmer";
Pattern p=Pattern.compile("java");
Matcher m=p.matcher(Date);
boolean b=m.lookingAt();
System.out.print("Go with java ?");
System.out.println(b?"Yes!":"No!");
}}
在eclipse中运行,没出现错误,然而在cmd.exe中运行却出现下列错误:
D:\java>java Application
Exception in thread "main" java.lang.NoClassDefFoundError: Application (wrong na
me: learning/study/Application)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
4)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
import java.util.regex.*;
class Application { /**
* @param args
*/
public static void main(String[] args) {
String Date="java Programmer";
Pattern p=Pattern.compile("java");
Matcher m=p.matcher(Date);
boolean b=m.lookingAt();
System.out.print("Go with java ?");
System.out.println(b?"Yes!":"No!");
}}
在eclipse中运行,没出现错误,然而在cmd.exe中运行却出现下列错误:
D:\java>java Application
Exception in thread "main" java.lang.NoClassDefFoundError: Application (wrong na
me: learning/study/Application)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
4)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
就可以了
java learning.study.Application还有,不知道你是如何编译的,要用 javac -d . Application.java