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

Mon, 30 March 2015 20:26

Logan King

Messages: 6
Registered: March 2015

Junior Member

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);
}
}

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

Mon, 30 March 2015 21:46

Nitin Dahyabhai

Messages: 4435
Registered: July 2009

Senior Member

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

_
Nitin Dahyabhai
Eclipse Web Tools Platform

[Updated on: Mon, 30 March 2015 21:46]

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

Mon, 30 March 2015 22:14

Logan King

Messages: 6
Registered: March 2015

Junior Member

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

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

Mon, 30 March 2015 22:34

Logan King

Messages: 6
Registered: March 2015

Junior Member

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

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

Mon, 30 March 2015 23:27

Russell Bateman

Messages: 3798
Registered: July 2009
Location: Provo, Utah, USA

Senior Member

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."

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

Mon, 30 March 2015 23:28

Russell Bateman

Messages: 3798
Registered: July 2009
Location: Provo, Utah, USA

Senior Member

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... ?

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

Mon, 30 March 2015 23:58

Logan King

Messages: 6
Registered: March 2015

Junior Member

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

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

Tue, 31 March 2015 00:05

Logan King

Messages: 6
Registered: March 2015

Junior Member

What should the package name be?

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

Tue, 31 March 2015 03:46

Nitin Dahyabhai

Messages: 4435
Registered: July 2009

Senior Member

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

_
Nitin Dahyabhai
Eclipse Web Tools Platform

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

Tue, 31 March 2015 04:05

Logan King

Messages: 6
Registered: March 2015

Junior Member

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);
}

}

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

Tue, 31 March 2015 04:46

Nitin Dahyabhai

Messages: 4435
Registered: July 2009

Senior Member

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?

_
Nitin Dahyabhai
Eclipse Web Tools Platform

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