Java 7 Syntax error

Question

I have Java 7 running on my mac:

    System.out.println(System.getProperty("java.version")); // prints 1.7.0_05

Project was created using

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Project properties confirm, i am on Java 7

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Default system Java is 7

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The following however results in syntax error

public static void main(String[] args) {    
    // Underscores in Numeric Litarals are ok here  
    int i = 11_234;
}

Eclipse is complaining with Syntax error on token "_234", delete this token

What happens on the commandline when you run `javac -version`? — Ray Toal, Jul 21 '12 at 21:22
In Eclipse `Syntax error on token "_234", delete this token` — James Raitsev, Jul 21 '12 at 21:31
Negative, this in fact is the first and only line in my Main class. Updated question — James Raitsev, Jul 21 '12 at 21:33
Looks like Eclipse is using a pre-Java7 compiler. What do you see under Project | Properties | Java Compiler? The compiler is different from the JRE on the build path. — Ray Toal, Jul 21 '12 at 21:33
Hmm .. you are correct .. 1.7 is not there. Not even in the drop down list .. Why is that? — James Raitsev, Jul 21 '12 at 21:36
Oh come on :) Downloading new version now. Thanks guys, you're awesome! — James Raitsev, Jul 21 '12 at 21:46

score 5 · Accepted Answer · edited May 23 '17 at 10:32

5

On Eclipse's Project|Properties dialog, there two entities Java Build Path and Java Compiler. The former will tell you what classes are used during the build, and you may have a Java 7 JRE listed there. The latter, however, is the compiler that will be used to compile your code. It is possible to have Eclipse use a Java 6 compiler even with a Java 7 JRE on the build path.

My guess is that you are using Helios, not Indigo. See Programming Java 7 in Eclipse

edited May 23 '17 at 10:32

Community

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answered Jul 21 '12 at 21:38

Ray Toal

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Thank you. Indeed this seems to be the case. I don't have 1.7 as an option on my Java Compiler section. How may i get it to appear there? – James Raitsev Jul 21 '12 at 21:42
Are you using Helios or Indigo? – Ray Toal Jul 21 '12 at 21:42
Downloading Juno now. Of all the things, updating Eclipse itself did not occur to me – James Raitsev Jul 21 '12 at 21:48

score 5 · Answer 2 · answered Jul 21 '12 at 21:41

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Make sure your version of Eclipse is 3.7.1 (this is Eclipse 3.7 Maintenance Build) or higher (see JDT/Eclipse Java 7 Support) and that you have registered Java 7 with Eclipse (see Eclipse and Java 7).

answered Jul 21 '12 at 21:41

Andy Harris

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Java 7 Syntax error

2 Answers2