Bug 76530 [options] Warn about unused local variables and private members
I think we should warn about unused local variables and unused private members by default. These things are errors akin to unused imports, which we already warn about.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/ModifierCorrectionsQuickFixTest.java
String preview= getPreviewContent(proposal);
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public void x() {\n");
		buf.append("        Runnable r= new Runnable() {\n");
		buf.append("            public void run() {\n");
		buf.append("               E e= new E();\n");
		buf.append("            }\n");
		buf.append("        };\n");
		buf.append("    }\n");
		buf.append("    E() {\n");
		buf.append("    }\n");
		buf.append("}\n");
		assertEqualString(preview, buf.toString());
	}		
	
	public void testNeedToEmulateFieldRead() throws Exception {
		Hashtable hashtable= JavaCore.getOptions();
		hashtable.put(JavaCore.COMPILER_PB_SYNTHETIC_ACCESS_EMULATION, JavaCore.ERROR);
		JavaCore.setOptions(hashtable);
				
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public void x() {\n");
		buf.append("        Runnable r= new Runnable() {\n");
		buf.append("            public void run() {\n");
		buf.append("               int x= fCount;\n");