Topic: 我初学java语言,第一次安装了jsdk1.4.2但是运行出错 |
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1.我初学java语言,第一次安装了jsdk1.4.2但是运行出错 | Copy to clipboard |
Posted by: cheweicai Posted on: 2005-03-08 21:55 我在系统xp盘(D盘根目录)下安装了j2sdk1.4.2后 进行环境变量的设置如下:JAVA_HOME=D:\j2sdk1.4.2 Path=d:\j2sdk1.4.2\bin CLASSPATH 变量值为:.; 然后编写一个程序Hello_Java.java如下: import java.lang.*;//引用包 public class Hello_Java { public static void main(String args[]) { Printer My_Printer=new Printer(); My_Printer.Hello(); } } class Printer { private int Serial_Number; public void Hello() { System.out.println("Hello Java!"); } } 编译后结果如下: D:\>java>javac Hello_Java.java Exception in thread "main" java.lang.NoClassDefFoundError:Hello_Java/java D:\>java>java Hello_Java 拒绝访问 请求大侠指点一下,,,,,,,,,,,,,,,,,谢谢!~~ |
2.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: fiveinone Posted on: 2005-03-10 22:11 hello cheweicai you can try like this : modify the value of classpath classpth=D:\j2sdk1.4.2\lib\tools.jar;D:\j2sdk1.4.2\jre\lib\rt.jar; fiveinone I am the only one and I am the best one. fiveinone@hotmail.com |
3.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: cheweicai Posted on: 2005-03-11 21:31 我把classpth改为D:\j2sdk1.4.2\lib\tools.jar;D:\j2sdk1.4.2\jre\lib\rt.jar; 还是出现 Exception in thread "main" java.lang.NoClassDefFoundError:Hello_Java/java 的错误!! 我是在系统xp盘(d 盘)根目录下的文件夹j2sdk1.4.2安装jsdk 请问path, classpath java_home 的值设为多少?? |
4.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: 周珍科 Posted on: 2005-03-11 23:45 建立一个.bat文件 只有先运行这个文件就可以了 其中.bat文件里面的值应该是set CLASSPATH=.;d:\j2sdk1.4.2\bin; |
5.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: cheweicai Posted on: 2005-03-12 13:27 我先建立了一个名为Java.bat的文件,文件内容为: set path=D:\j2sdk1.4.2\bin\ set classpath=.; 然后在xp 系统下进入C:命令提示符 输入命令 d:\java>Java.bat d:\java>javac Hello_Java.java d:\java>java Hello_Java 出现"拒绝访问"的出错信息, 以前出现的错误 Exception in thread "main" java.lang.NoClassDefFoundError:Hello_Java/java 没有出现了, 为什么还是有问题,请高手请教一下啊,在下感激不尽!!!!!!!!! 我是在d盘根目录下建立一个文件名为java的文件夹 D盘---------------------------- |______________java |___________Hello_Java |_________Hello_Java.java |_________Java.bat |
6.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: cheweicai Posted on: 2005-03-12 13:29 我是在d盘根目录下建立一个文件名为java的文件夹 D盘---------------------------- |______________java |___________Hello_Java |_________Hello_Java.java |_________Java.bat |
7.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: coolwind1022 Posted on: 2005-03-13 09:52 classpth=D:\j2sdk1.4.2\lib\tools.jar;D:\j2sdk1.4.2\jre\lib\rt.jar; |
8.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: lenkeny Posted on: 2005-03-14 22:19 path: d:\j2sdk1.4.2/bin; classpath: d:; java_home: d:\j2sdk1.4.2 |
9.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: yangnian Posted on: 2005-03-15 14:58 JAVA_HOME=D:\j2sdk1.4.2 Path=d:\j2sdk1.4.2\bin classpth=.;D:\j2sdk1.4.2\lib\tools.jar;D:\j2sdk1.4.2\jre\lib\rt.jar; |
10.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: xiaowu0128 Posted on: 2005-03-22 10:19 你们发这么多,哪个是对的? 我现在都有点有知道应该相信谁了! 能不能给个比较好的! 谢了! |
11.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: kaiserlew Posted on: 2005-03-22 23:55 set path=%path%;D:\j2sdk1.4.2\bin |
12.Re:我初学java语言,第一次安装了jsdk1.4.2但是运行出错 [Re: cheweicai] | Copy to clipboard |
Posted by: why Posted on: 2005-03-23 08:07 cheweicai wrote: please be careful when you posted! the above should be: D:\>java>javac Hello_Java.java 拒绝访问 D:\>java>java Hello_Java Exception in thread "main" java.lang.NoClassDefFoundError:Hello_Java/java in other words, your program was not compiled so it couldn't be run. Your original settings should be fine, with minor modifications: 进行环境变量的设置如下: SET JAVA_HOME=D:\j2sdk1.4.2 SET PATH=%PATH%;%JAVA_HOME%\bin SET CLASSPATH=. (no trailing semicolon) 我是在d盘根目录下建立一个文件名为java的文件夹 This tree is quite misleading. Seems to me that Hello_Java.java and Java.bat are under D:\java\Hello_Java d:\java>java Hello_Java where is your Hello_Java.java????? if it is not in D:\java, you should get some read error : I don't know whether this corresponds to "拒绝访问" sigh... 一塌糊塗 |
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