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Bug 336237

Summary:	Java Compiler using JDK 6.0 and compliance to 1.4 does not see the incompatible java.util.Arrays methods
Product:	[Eclipse Project] JDT	Reporter:	Dervillo <eduardo.oliveirared>
Component:	Core	Assignee:	Olivier Thomann <Olivier_Thomann>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	normal
Priority:	P3	CC:	eclipse, Olivier_Thomann
Version:	3.7
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Dervillo

2011-02-03 10:01:17 EST

Build Identifier: 3.6.1

While using JDK 6.0 but with compliance to 1.4, the Eclipse IDE did not alert me that the Arrays.copyOf(...) and Arrays.toString(...) methods were not compatible to JDK 1.4 version. The problem was only verified when deploying on the environment that was using JDK 1.4.

Reproducible: Always

Steps to Reproduce:
1.Set the project JSDK to 6.0
2.Set the Java Compiler compliance to JDK 1.4
3.Use the java.util.Arrays.toString(byte[]) or java.util.Arrays.copyOf(byte[], length) methods. (without error even it is not JDK 1.4 compliance.

Comment 1 Walter Harley

2011-02-03 14:35:44 EST

The Arrays methods are part of the JRE, not part of the language.  In addition to setting the compiler compliance to 1.4, you also need to specify a 1.4 JRE.  Did you do that?

Comment 2 Olivier Thomann

2011-02-03 15:22:59 EST

The compiler doesn't detect that as it takes whatever is available on the classpath. So if you really want to be compliant with 1.4, simply set 1.4 libraries on the classpath.
Now from within eclipse, you can convert your java project to be a PDE project and then set it to use API Tools.
API tools has all what you need to detect these wrong usages.
See the following blog entry:
http://olivier-eclipse.blogspot.com/2010/11/workspace-settings-vs-project-settings.html

Comment 3 Olivier Thomann

2011-02-09 14:23:54 EST


*** This bug has been marked as a duplicate of bug 256034 ***