我有一个文件夹,里面装满了我上课的课程。随着jGrasp的全新安装,以前运行良好的旧项目现在充满了“未找到符号”错误。
我仍然有图书馆,但我不知道如何导入它们。我们的类的设置方式,你不需要为库中的任何东西导入语句。
/* Turtle Drawing Program Lab 6, Part B */
/* Started by Celine Latulipe , modified by Bruce Long*/
public class Lab6PartB {
public static void main(String [] args)
{
/* Create the world */
World w = new World();
/* Create the turtle, call him Tom */
Turtle tom = new Turtle(w);
/* test the getDistance2() method */
int dist = tom.getDistance2();
System.out.println("This should print out the value 400. Value is: " + dist);
tom.moveTo(500, 400);
dist = tom.getDistance2();
System.out.println("This should print out the value 640. Value is: " + dist);
// TODO: Add a third test case that you make up
}
}
错误:
----jGRASP exec: java Lab6PartB
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: ModelDisplay
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: ModelDisplay
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
答案 0 :(得分:0)
您可以在操作系统级别或使用“设置”>将包含类文件的目录添加到类路径中。 “PATH / CLASSPATH”> jGRASP中的“工作区”。
此外,您可以将所有类文件/目录复制到包含新项目类的文件夹中。