CODEWITHSUNDEEP
javaeclipse
Oliver Watkins
Oliver Watkins

Reputation: 13499

Weird compile error in Eclipse and Netbeans

I am getting an error : Syntax error on tokens, delete these tokens, on valid Java code

enter image description here

My code, copied and pasted from eclipse, is here :

public class Test2 {
    public static void main(String[] args) {

    }
}

I am guessing that there is some hidden character in the code which I can't see. I tried restarting Eclipse, and cleaning the project, but the error is still there!

Even if I copy and paste this code from SO into eclipse the error is still there!

what is going on here?

EDIT

Its not Eclipse! In Netbeans I get the same error :

enter image description here

Also, the original problem occurred when I tried to copy and paste code examples from this webpage http://blue-walrus.com/2011/05/advanced-swing-multithreading-tutorial/

Upvotes: 0

Views: 731

Answers (6)

Grim
Grim

Reputation: 1974

ZWSP and other non-printing characters

Means a Zero-Width-Space character. You are using UTF8 and some characters have a width of 0 so you can not see them.

Change the Encoding to ANSI and back will solve your Problem.

Upvotes: 0

Oliver Watkins
Oliver Watkins

Reputation: 13499

To remove these strange hidden empty space characters, I copy and pasted into Outlook Email, and then copy and pasted into Notepad++, and then copied into Eclipse. All fixed :)

Seems you need to copy and paste situations like this through a few different apps, to 'scrub' the text of any funny characters.

Upvotes: 1

Brad
Brad

Reputation: 15879

Following on from my comments your project must have a valid JDK and JRE defined

enter image description here

enter image description here

If these are missing from your project, go to Window > Preferences> Java Installed JREs and click Add..

enter image description here

If you make any changes select Project > Clean... again

Upvotes: 1

Ram72119
Ram72119

Reputation: 107

better to check your project build path i.e, JRE system library version/is that set or not in the eclipse

way to go for properties section of eclipse :

right click on project - > choose properties ->build path->Libraries->Add Library Variable->JRE system library->click Add alternate JRE radio button->and select your machine jre->click finish->OK

after that go for java compiler in the same window (left side)->check the enable project settings->and choose your java version from drop down box->click Apply->OK

finally save your program and run it

if it again fails you need to check whether you are setting the classpath in proper or not, for this please refer this link to set classpath :Link

Upvotes: 0

Stephen C
Stephen C

Reputation: 718758

I just did the following:

  1. Cut and paste the code from your Question to a file and compiled it using javac (Java 8). No compilation errors.

  2. Opened Eclipse (Kepler), created a Test2 class, copied the code from the Question to it, and saved it. No compilation errors.

My tentative conclusion is that there is nothing wrong with the java code. (No funky hidden characters, no nasty homoglyphs, no messed up character encodings.) The most likely cause of these weird errors is that your Eclipse session is messed up:

  • Try restarting Eclipse.

  • Try closing and opening the Project.

  • Try loading your code into a fresh workspace.

  • In extremis ... try a fresh install of Eclipse (same version as before ...)

Upvotes: 1

Pritam Mishra
Pritam Mishra

Reputation: 1

I think the java class path is not set in your computer if that is the case go to my computer->properties->Advanced System settings->Advanced tab click Environment variables find variable path & check if the java class path is there. If its not there i suggest you to copy the java class path & edit variable path & paste the url followed by ";" & then restart the eclipse.

Upvotes: 0

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