Exception in thread "main" java.lang.NoClassDefFoundError: HelloJava
Caused by: java.lang.ClassNotFoundException: HelloJava
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: HelloJava. Program will exit.
public class HelloJava{
public static void main(String []agrs){
System.out.print("Hello java!!");
}
}
你在cmd里 javac 能找到jdk么