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/wizards/JavaProjectWizardFirstPage.java
private final SelectionButtonDialogField fUseDefaultJRE, fUseProjectJRE;
		private final ComboDialogField fJRECombo;
		private final Group fGroup;
		private String[] fComplianceLabels;
		private String[] fComplianceData;
		private final Link fPreferenceLink;
		private IVMInstall[] fInstalledJVMs;
		
		public JREGroup(Composite composite) {
			fGroup= new Group(composite, SWT.NONE);
			fGroup.setFont(composite.getFont());
			fGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
			fGroup.setLayout(initGridLayout(new GridLayout(3, false), true));
			fGroup.setText(NewWizardMessages.JavaProjectWizardFirstPage_JREGroup_title);