It can work with Java 1.6 so let it work with it :)

.classpath

@@ -3,7 +3,7 @@
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="lib" path="/Icy-App/plugins/adufour/ezplug/EzPlug.jar"/>
 	<classpathentry kind="lib" path="/Icy-App/plugins/adufour/blocks/Blocks.jar"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
 	<classpathentry kind="var" path="ICY_JAR"/>
 	<classpathentry kind="output" path="bin"/>
 	<referencedentry kind="lib" path="D:/Stephane/Documents/dev/GIT/Icy-App/lib/scifio.jar" sourcepath="D:/Stephane/Documents/dev/GIT/bioformats"/>

.settings/org.eclipse.jdt.core.prefs

 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
-org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+org.eclipse.jdt.core.compiler.compliance=1.7
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
-org.eclipse.jdt.core.compiler.source=1.6
+org.eclipse.jdt.core.compiler.source=1.7