error explanation

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error explanation

 
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  #1
Mar 26th, 2008
what does it mean when while trying to run a .class file I get "Exception in thread "main" java.lang..NoSuchMethodError: main"???
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Re: error explanation

 
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  #2
Mar 27th, 2008
Most probably the .class file that you are trying to run is not a driver class where the main method is coded to call and run the coding.
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Re: error explanation

 
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  #3
Mar 27th, 2008
Well I am using the file from another post here in the forums, I was playing around look for code to go through to better my understanding.

the file is attached below, it compiles fine but won't run, and I get the afore mentioned error.
Attached Files
File Type: java JMath.java (3.0 KB, 4 views)
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Re: error explanation

 
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  #4
Mar 27th, 2008
it appears to be an applet. you usually have to embed the applet in an HTML page using applet tags and use a browser to run it
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Re: error explanation

 
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  #5
Mar 27th, 2008
To run an applet, you will need an html file with this example coding:

<Html>
<Head>
<Title>Java Example</Title>
</Head>
<Body>
This is my page<br>
Below you see an applet<br>
<br>
<Applet Code="MyApplet.class" width=200 Height=100>
</Applet>
</Body>
</Html>

You must specify the .class file that you compile at the applet code tag. Use appletviewer command to run the html file on DOS.
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Re: error explanation

 
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  #6
Mar 27th, 2008
okay I played with the code did something different, so that I don't have to use, html. but I am getting all of these errors file is attached. if anyone could help me I would be very happy... LOL


F:\Javawork\Multiplication\Multiplication.java:22: <identifier> expected
System.out.println("How much is "); int = Number1 (" TIMES "); int = Number2 (" ? ");
^
F:\Javawork\Multiplication\Multiplication.java:22: illegal start of type
System.out.println("How much is "); int = Number1 (" TIMES "); int = Number2 (" ? ");
^
F:\Javawork\Multiplication\Multiplication.java:22: <identifier> expected
System.out.println("How much is "); int = Number1 (" TIMES "); int = Number2 (" ? ");
^
F:\Javawork\Multiplication\Multiplication.java:22: <identifier> expected
System.out.println("How much is "); int = Number1 (" TIMES "); int = Number2 (" ? ");
^
F:\Javawork\Multiplication\Multiplication.java:23: <identifier> expected
UserAnswer = input.nextInt();
^
F:\Javawork\Multiplication\Multiplication.java:26: illegal start of type
if ( int = UserAnswer == int = ActualAnswer ) // if answer is correct
^
F:\Javawork\Multiplication\Multiplication.java:26: <identifier> expected
if ( int = UserAnswer == int = ActualAnswer ) // if answer is correct
^
F:\Javawork\Multiplication\Multiplication.java:26: ';' expected
if ( int = UserAnswer == int = ActualAnswer ) // if answer is correct
^
F:\Javawork\Multiplication\Multiplication.java:26: illegal start of type
if ( int = UserAnswer == int = ActualAnswer ) // if answer is correct
^
F:\Javawork\Multiplication\Multiplication.java:26: <identifier> expected
if ( int = UserAnswer == int = ActualAnswer ) // if answer is correct
^
F:\Javawork\Multiplication\Multiplication.java:26: ';' expected
if ( int = UserAnswer == int = ActualAnswer ) // if answer is correct
^
F:\Javawork\Multiplication\Multiplication.java:30: illegal start of type
if ( int = UserAnswer != int = ActualAnswer ) // if answer is not correct
^
F:\Javawork\Multiplication\Multiplication.java:30: <identifier> expected
if ( int = UserAnswer != int = ActualAnswer ) // if answer is not correct
^
F:\Javawork\Multiplication\Multiplication.java:30: ';' expected
if ( int = UserAnswer != int = ActualAnswer ) // if answer is not correct
^
F:\Javawork\Multiplication\Multiplication.java:30: illegal start of type
if ( int = UserAnswer != int = ActualAnswer ) // if answer is not correct
^
F:\Javawork\Multiplication\Multiplication.java:30: <identifier> expected
if ( int = UserAnswer != int = ActualAnswer ) // if answer is not correct
^
F:\Javawork\Multiplication\Multiplication.java:30: ';' expected
if ( int = UserAnswer != int = ActualAnswer ) // if answer is not correct
^
17 errors

Tool completed with exit code 1
Attached Files
File Type: java Multiplication.java (782 Bytes, 2 views)
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Re: error explanation

 
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  #7
Mar 27th, 2008
do you know any Java at all?
Those lines are utter nonsense in the light of the language specification.
As people are clearly allowed to attack me but I'm not allowed to defend myself, I no longer post to this site.
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Re: error explanation

 
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  #8
Mar 27th, 2008
um.. so for starters, you know that you can only put code in methods? you can't have statements randomly outside methods
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Re: error explanation

 
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  #9
Mar 27th, 2008
okay this program is almost halfway done, right now I have no errors and the file runs fine, except I need it to ask another random question if the user gets the right answer, or back to the same question if the user gets it wrong. I am thinking of using if-else or while statements, but I am not sure how to form them. attached is the current file as is.
Attached Files
File Type: java Multiplication.java (783 Bytes, 3 views)
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Re: error explanation

 
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  #10
Mar 30th, 2008
check wether u had saved the name of file as a class which has got main method....remember it is case sensitive
Last edited by mailmeatvishnu; Mar 30th, 2008 at 8:06 am. Reason: gramaar
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