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Error: Could not find or load main class ScopeApp [message #1690726]

Mon, 30 March 2015 16:26

Eclipse User

I have just recently typed the code below, and it keeps giving me the the error message: Error: Could not find or load main class ScopeApp. I have looked all over the internet for the internet for the solution but I can't find it. So can someone please help me.
Code:

public class ScopeApp
{
static int x;
public static void main(String[] args)
{
x = 5;
System.out.println("main: x = " + x);
myMethod();
}
public static void myMethod()
{
int y;
y = 10;
if (y == x + 5)
{
int z;
z = 15;
System.out.println("myMethod: z = " + z);
}
System.out.println("myMethod: x = " + x);
System.out.println("myMethod: y = " + y);
}
}

Re: Error: Could not find or load main class ScopeApp [message #1690732 is a reply to message #1690726]

Mon, 30 March 2015 17:46

Eclipse User

When does it(?) give you that error message? Have you tried putting your class in a package?

[Updated on: Mon, 30 March 2015 17:46] by Moderator

Re: Error: Could not find or load main class ScopeApp [message #1690734 is a reply to message #1690732]

Mon, 30 March 2015 18:14

Eclipse User

It gives me the error message after i try to run the code

Re: Error: Could not find or load main class ScopeApp [message #1690735 is a reply to message #1690734]

Mon, 30 March 2015 18:34

Eclipse User

And i am 99.9% certain that the class is in a package

Re: Error: Could not find or load main class ScopeApp [message #1690740 is a reply to message #1690735]

Mon, 30 March 2015 19:27

Eclipse User

On 03/30/2015 04:34 PM, Logan King wrote:
> And i am 99.9% certain that the class is in a package

Yes, likely it's in what's called the "default package."

Re: Error: Could not find or load main class ScopeApp [message #1690741 is a reply to message #1690734]

Mon, 30 March 2015 19:28

Eclipse User

On 03/30/2015 04:14 PM, Logan King wrote:
> It gives me the error message after i try to run the code

Yes, but how are you trying to run the code?

Are you right-clicking ScopeApp.java in the Project or Package Explorer
view and choosing Run/Debug As... ?

Re: Error: Could not find or load main class ScopeApp [message #1690743 is a reply to message #1690740]

Mon, 30 March 2015 19:58

Eclipse User

Yes its in the "default package", what package should i put it in

Re: Error: Could not find or load main class ScopeApp [message #1690744 is a reply to message #1690743]

Mon, 30 March 2015 20:05

Eclipse User

What should the package name be?

Re: Error: Could not find or load main class ScopeApp [message #1690753 is a reply to message #1690744]

Mon, 30 March 2015 23:46

Eclipse User

Short answer: make one up for now, you can always change it later. Long answer: http://www.oracle.com/technetwork/java/codeconventions-135099.html .

Re: Error: Could not find or load main class ScopeApp [message #1690755 is a reply to message #1690753]

Tue, 31 March 2015 00:05

Eclipse User

Ok I have put it in a package called com.example.scope_app. But after I click on the 'run' button to try running the code below, the computer output says Error: Could not find or load main class com.example.scope_app.ScopeApp. So what do I do now?
Code:
package com.example.scope_app;

public class ScopeApp
{

static int x;

public static void main(String[] args)
{
x = 5;
System.out.println("main: x = " + x);
myMethod();
}

public static void myMethod()
{
int y;
y = 10;
if (y == x + 5)
{
int z;
z = 15;
System.out.println("myMethod: z = " + z);
}
System.out.println("myMethod: x = " + x);
System.out.println("myMethod: y = " + y);
}

}

Re: Error: Could not find or load main class ScopeApp [message #1690758 is a reply to message #1690755]

Tue, 31 March 2015 00:46

Eclipse User

Was a ScopeApp.class file created (check from outside of Eclipse)? Are you using something else to do the compilation like Ant or Maven? Are there any messages in the Problems or Markers views?

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