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Implicit conversion between Double and double [message #731813]

Mon, 03 October 2011 07:59

Sayan Mukherjee

Messages: 2
Registered: October 2011
Location: Mumbai, India

Junior Member

I am getting different behaviour in two different Eclipse installations:

Env A -> JDK 7.0, JRE 7.0 and Eclipse Galileo
Env B -> JDK 1.6.0_03, JRE 1.6.0_03 and Eclipse Pulsar

The code:

	Double d1 = new Double(1.234); /* Line 1 */
	double d = 7.32;	       /* Line 2 */
	Double d2 = d1 + d;            /* Line 3 */

In Env A:
When I try to compile the above code, I get a Eclipse compile error in Line 3 saying the operator '+' cannot add 'Double' with 'double'. Eclipse shows a red marker under the '+' sign.

In Env B:
THE CODE WORKS!

I think it is NOT an issue with JSE/JDK version - it is possibly some config in Eclipse. Can somebody tell me what is this config so that code can compile in Eclipse Galileo?

Thanks in advance.

Sayan

[Updated on: Mon, 03 October 2011 08:00]

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Re: Implicit conversion between Double and double [message #732057 is a reply to message #731813]

Mon, 03 October 2011 19:53

Sayan Mukherjee

Messages: 2
Registered: October 2011
Location: Mumbai, India

Junior Member

I found the reason of the code not compiling in my setup of Eclipse Galileo.

The config parameter is here:

Project -> Properties -> Java Compiler

There is a group box called JDK Compliance, possibly to provide backward compatibility.

The property Compiler Compliance Level should be set to 1.5 or above for the implicit coversion between primitives and their wrappers to work.

Mine was set to 1.4!!!

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