Topic: 请问关于java.lang.math的问题 |
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1.请问关于java.lang.math的问题 | Copy to clipboard |
Posted by: siage Posted on: 2004-09-15 15:46 为什么我在j2sdk1.4.2_04下无法调用math类,而在j2sdk1.4却可以?我在2台不同的机器上编译同一个程序,在装有j2sdk1.4.2_04下就会出现如下错误: mathtest.java:6: cannot resolve symbol symbol : method sqrt (double) location: interface Math System.out.println("the sqrt(7.0)= "+Math.sqrt(7.0)); 附上mathtest.java import java.lang.Math.*; public class mathtest { public static void main(String args[]) { System.out.println("the sqrt(7.0)= "+Math.sqrt(7.0)); } } j2sdk1.4.2_04环境变量配置: path=C:\j2sdk1.4.2_04\bin class_path=c:\j2sdk1.4.2_04\lib\tools.jar; c:\tomcat\common\lib\servlet.jar; D:\mysql\lib\WEB-INF\lib\mm.mysql-2.0.4-bin ^ |
2.Re:请问关于java.lang.math的问题 [Re: siage] | Copy to clipboard |
Posted by: nothing Posted on: 2004-09-15 16:19 classpath , 不是 class_path 但是我的 classpath=. 就可以,你的。。。怪. |
3.Re:请问关于java.lang.math的问题 [Re: siage] | Copy to clipboard |
Posted by: siage Posted on: 2004-09-15 18:32 我也很奇怪啊,我把.java文件放在别的文件夹里编译就可以,但是就是在原来的文件夹里不行,只要是Math类就都会出现这种问题,真是怪了,是我设置的不对吗?但是调用别的类都没有问题,只有Math类,只要调用就会出问题 |
4.Re:请问关于java.lang.math的问题 [Re: siage] | Copy to clipboard |
Posted by: helloworld Posted on: 2004-09-15 21:54 极有可能是RPWT. |
5.Re:请问关于java.lang.math的问题 [Re: helloworld] | Copy to clipboard |
Posted by: why Posted on: 2004-09-15 22:10 helloworld wrote: What's RPWT? |
6.Re:请问关于java.lang.math的问题 [Re: why] | Copy to clipboard |
Posted by: hncszy Posted on: 2004-09-16 00:40 why wrote: rpwt abbr. =人品问题,bbs、论坛中常用语。 |
7.Re:请问关于java.lang.math的问题 [Re: siage] | Copy to clipboard |
Posted by: siage Posted on: 2004-09-16 11:27 不至于吧,本人一向忠厚老实,待人热情,为人诚恳(此处省去n w句)。。。 怎么不是jdk发彪呢? |
8.Re:请问关于java.lang.math的问题 [Re: siage] | Copy to clipboard |
Posted by: dorrenchen Posted on: 2004-09-16 21:23 remove the line "import java.lang.Math.*" and try again. All classes in java.lang package are included by default, no need to import in your code. and java.lang.Math is a class, not a package. class name should always starts with a capital letter, like "Mathtest" |
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