Compile single .java file with two classes into two .class files -


i have .java file set this:

package com.ds;  class c{...}  public class main{...}

when compile file main.java, results in single .class file being main.class.

when try run .class java com.ds.main not work! says cannot find or load class.

when try run .class java main runs, error so:

exception in thread "main" java.lang.noclassdeffounderror: main (wrong name: com /datingservice/main)   @ java.lang.classloader.defineclass1(native method)  @ java.lang.classloader.defineclass(classloader.java:792) @ java.security.secureclassloader.defineclass(secureclassloader.java:142) @ java.net.urlclassloader.defineclass(urlclassloader.java:449) @ java.net.urlclassloader.access$100(urlclassloader.java:71) @ java.net.urlclassloader$1.run(urlclassloader.java:361) @ java.net.urlclassloader$1.run(urlclassloader.java:355) @ java.security.accesscontroller.doprivileged(native method) @ java.net.urlclassloader.findclass(urlclassloader.java:354) @ java.lang.classloader.loadclass(classloader.java:424) @ sun.misc.launcher$appclassloader.loadclass(launcher.java:308) @ java.lang.classloader.loadclass(classloader.java:357) @ sun.launcher.launcherhelper.checkandloadmain(launcherhelper.java:482)

i've seen before while trying find solution , none of solutions found applied me or didn't work.

after doing bit more research assuming javac not split classes within file @ least default? know many ides eclipse , intellij split classes 2 separate .class files (i can confirm this). there way javac this? i'm using javac compiler intellij there must way unless it's done before compiling.

if remove package, can run java main fine single .class file compiled. i'm bit confused, , little desperate. trying avoid changing code or splitting classes 2 separate .java files.

i not sure doing wrong show how can done.

lets have directories , files

[myproject]   |   +--[src]   |    |   |    +--[com]   |        |   |        +--[datingservice]   |            |   |            +-- main.java   |   +--[classes]

and main.java file looks like

package com.datingservice;  class c{     private int i;     public void seti(int i){         this.i=i;     }     public int geti(){         return this.i;     } }  public class main{     public static void main(string[] args){         c mycvariable = new c();          mycvariable.seti(10);         system.out.println(mycvariable.geti());     } }

in terminal need go myproject directory , use

myproject>javac -d classes src\com\datingservice\main.java

thanks -d (directory) parameter packages compiled classes should placed in classes directory (note classes directory must exist). c.class , main.class placed in myproject\classes\com\datingservice.

now run main method main class need provide information directory contains packages (this classpath) , use full.package.name.to.your.mainclass. have add -classpath classes (or shorter -cp classes) parameter java command , run like

myproject>java -cp classes com.datingservice.main

(note: there no .java suffix after main class since jvm running binaries stored in .class files, not code .java files)


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