Bug 123786 Following bug 109980, the compliance 6.0 should be added to the compiler's compliance list.
If the JRE/JDK used is a 1.6/6.0 VM, then the compliance 6.0 should be available. Compliance 1.6 implies source level 1.6 and target level 1.6.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/ComplianceConfigurationBlock.java
PreferencesMessages.ComplianceConfigurationBlock_version13, 
			PreferencesMessages.ComplianceConfigurationBlock_version14, 
			PreferencesMessages.ComplianceConfigurationBlock_version15
		};
		
		label= PreferencesMessages.ComplianceConfigurationBlock_codegen_targetplatform_label; 
		addComboBox(group, label, PREF_CODEGEN_TARGET_PLATFORM, versions, versionsLabels, indent);	
		label= PreferencesMessages.ComplianceConfigurationBlock_source_compatibility_label; 
		addComboBox(group, label, PREF_SOURCE_COMPATIBILITY, values345, values345Labels, indent);	
		String[] errorWarningIgnore= new String[] { ERROR, WARNING, IGNORE };
		
		String[] errorWarningIgnoreLabels= new String[] {
			PreferencesMessages.ComplianceConfigurationBlock_error,  
			PreferencesMessages.ComplianceConfigurationBlock_warning, 
			PreferencesMessages.ComplianceConfigurationBlock_ignore
		};
		label= PreferencesMessages.ComplianceConfigurationBlock_pb_assert_as_identifier_label; 
		addComboBox(group, label, PREF_PB_ASSERT_AS_IDENTIFIER, errorWarningIgnore, errorWarningIgnoreLabels, indent);		
		label= PreferencesMessages.ComplianceConfigurationBlock_pb_enum_as_identifier_label; 
		addComboBox(group, label, PREF_PB_ENUM_AS_IDENTIFIER, errorWarningIgnore, errorWarningIgnoreLabels, indent);		
		
		Control[] allChildren= group.getChildren();
		fComplianceControls.addAll(Arrays.asList(allChildren));
		fComplianceControls.removeAll(Arrays.asList(otherChildren));
		layout= new GridLayout();
		layout.numColumns= nColumns;
		group= new Group(fControlsComposite, SWT.NONE);
		group.setFont(fControlsComposite.getFont());
		group.setText(PreferencesMessages.ComplianceConfigurationBlock_classfiles_group_label); 
		group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));