我想使用别人已经做好的包,如numbercruncher目录下有 graphutils,mathutils现在有: import numbercruncher.mathutils.Function;
import numbercruncher.graphutils.*;
public class SolveDiffEq
{........}
通过编译,但
运行时有错误提示:C:\JCreator Pro\MyProjects>java SolveDiffEq
Exception in thread "main" java.lang.NoClassDefFoundError: SolveDiffEq请问应该怎么做?若是用JCreator又要怎么配置?请大家帮忙,谢谢!
com.sun.aa
你就import com.sun.aa.*;
运行时有错误提示:C:\JCreator Pro\MyProjects>java SolveDiffEq
Exception in thread "main" java.lang.NoClassDefFoundError: SolveDiffEq这是怎么回事啊?
package numbercruncher.program8_1;import numbercruncher.mathutils.DifferentialEquation;
import numbercruncher.mathutils.DataPoint;
import numbercruncher.mathutils.DiffEqSolver;
import numbercruncher.mathutils.EulersDiffEqSolver;
import numbercruncher.mathutils.PredictorCorrectorDiffEqSolver;
import numbercruncher.mathutils.RungeKuttaDiffEqSolver;
import numbercruncher.mathutils.AlignRight;/**
* PROGRAM 8-1: Solve Differential Equations
*
* Demonstrate algorithms for solving differential equations.
*/
public class SolveDiffEq
{
.........
}我在JDK里运行还是出现这个错误
C:\JCreator Pro\MyProjects>java SolveDiffEq
Exception in thread "main" java.lang.NoClassDefFoundError: SolveDiffEq (wrong
name: numbercruncher/program8_1/SolveDiffEq)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)环境变量设置:
CLASSPATH .;C:\j2sdk1.4.2_04\lib\tools.jar
path C:\j2sdk1.4.2_04\bin
public class 类里没有public static void main(String args[]) 函数或者 这个函数书写错误String S 大写。
JC 里面调试里是不是设置正确(main函数是不是这个类的main函数)。
是不是建立了工作区,工程