Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.C:\Documents and Settings\maya>g:G:\>cd devG:\dev>javac hellodate.javaG:\dev>java hellodate
Exception in thread "main" java.lang.NoClassDefFoundError: hellodate (wrong name
: HelloDate)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)G:\dev>
(C) 版权所有 1985-2001 Microsoft Corp.C:\Documents and Settings\maya>g:G:\>cd devG:\dev>javac hellodate.javaG:\dev>java hellodate
Exception in thread "main" java.lang.NoClassDefFoundError: hellodate (wrong name
: HelloDate)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)G:\dev>
有时候,配完环境重起一下,才能让>java命令生效,什么原因我也不清楚.
我的电脑”->属性->高级->环境变量 系统变量->新建->变量名:JAVA_HOME 变量值:E:\j2sdk1.4.2\
系统变量->新建->变量名:CLASSPATH 变量值:.;%JAVA_HOME%\lib
系统变量->编辑->变量名:Path 在变量值的最前面加上:%JAVA_HOME%\bin;
高手救命啊!我要疯了啊!
path 为: E:\j2sdk1.4.2\bin;
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
高手救命啊!我要疯了啊!
javac hellodate.java
大哥,你看看兩個名字不一樣的,怎麼會時
也不行!!!!!!!!!!!111
HelloDate
看看他给你的提示信息
是不是仍旧这样?把.exe去掉!!!!
如果还有错,把你的错误提示再贴出来!!
classpath为: .;E:\j2sdk1.4.2\lib\tools.jar;E:\j2sdk1.4.2\\lib\dt.jar;
=========>看看这里,你仔细看看!!!!!!!都有什么异常?
这是你自己敲进去的还是拷贝的?如果是拷贝的,肯定有问题。
//=====================Hi.java===================
public class Hi
{
public static void main(String args[ ])
{
System.out.println("Hi");
}
}编译的时候: javac Hi.java 通过,生成Hi.class类文件。。
然后: java Hi 出错:
C:\j2sdk\lib>java Hi
Exception in thread "main" java.lang.NoClassDefFoundError: Hi怎么回事啊~!!!!!!!!!!!!!!!!!!!!不会非要我打sp3吧~!!!!!!!!!!!!!大家来救我们啊~!!!!!!!!!!!!!!
path 为: E:\j2sdk1.4.2\bin;
Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.C:\Documents and Settings\maya>g:G:\>cd devG:\dev>dir
驱动器 G 中的卷是 Workspaces
卷的序列号是 A499-9877 G:\dev 的目录2003-07-21 14:11 <DIR> .
2003-07-21 14:11 <DIR> ..
2003-07-20 20:47 <DIR> .dependency-info
2003-07-12 19:52 <DIR> .metadata
2003-07-02 18:27 <DIR> api
2003-07-21 14:15 <DIR> AVID
2003-07-14 14:34 <DIR> bea
2003-07-21 14:37 1,282 Bool.class
2001-06-13 14:04 996 Bool.java
2003-07-21 13:46 0 cd
2003-07-21 14:33 1,282 hell.class
2003-07-21 13:08 962 hell.java
2003-07-21 13:07 962 hell.java~
2003-07-21 13:05 0 hell.java~1~
2003-07-21 13:06 964 hell.java~2~
2003-07-21 14:47 501 HelloDate.class
2001-06-13 14:04 665 HelloDate.java
2003-07-21 13:34 427 HelloWorld.class
2003-07-21 14:11 173 HelloWorld.java
2003-07-21 13:37 151 HelloWorld.java~1~
2003-07-20 20:54 <DIR> java
2003-07-21 13:46 0 javac
2003-07-02 18:26 <DIR> jcp
2003-07-14 12:28 <DIR> mfc
2003-07-14 12:28 <DIR> myapp
2003-07-20 21:24 <DIR> pb
2003-07-20 20:15 <DIR> pkg
2003-07-20 22:30 <DIR> vb
14 个文件 8,365 字节
14 个目录 82,632,704 可用字节G:\dev>javac hellodate.javaG:\dev>java hellodate
Exception in thread "main" java.lang.NoClassDefFoundError: hellodate (wrong name
: HelloDate)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)G:\dev>我要跳楼了!!!!!!!!!!!!!!!!!1
我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1我要跳楼了!!!!!!!!!!!!!!!!!1
Hello, it's:
Mon Jul 21 22:51:59 CST 2003G:\dev>javac Bool.javaG:\dev>java Bool
i = -3
j = -54
i > j is true
i < j is false
i >= j is true
i <= j is false
i == j is false
i != j is true
(i < 10) && (j < 10) is true
(i < 10) || (j < 10) is trueG:\dev>