Bug 120389 [quick fix] replace conditional with if-else removes + from +=
Using Build I20051102-1600. I create a class [snip] package bla; class Bla { void bla() { boolean cond = true; int i = 42; i += ( cond ) ? 1 : 2; } } [snap] Now I move the cursor over the second cond and trigger the Quickfix 'Replace conditional with if-else'. This results in [snip] int i = 42; if (cond) i = 1; else i = 2; [snap] i.e. replaces the '+=' with '='. (Credit to Jordi Boehme for finding this.)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/AdvancedQuickAssistProcessor.java
prevIfStatement= newIfStatement;
		}
		rewrite.replace(firstIfStatement, firstNewIfStatement, null);
		
		String label= CorrectionMessages.AdvancedQuickAssistProcessor_joinIfSequence;
		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
		ASTRewriteCorrectionProposal proposal= new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, 1, image);
		resultingCollections.add(proposal);
		return true;
	}
	private static boolean getConvertSwitchToIfProposals(IInvocationContext context,
			ASTNode covering,
			Collection resultingCollections) {
		if (!(covering instanceof SwitchStatement)) {
			return false;
		}
		
		if (resultingCollections == null) {
			return true;
		}
		
		final AST ast= covering.getAST();
		final ASTRewrite rewrite= ASTRewrite.create(ast);
		
		SwitchStatement switchStatement= (SwitchStatement) covering;
		IfStatement firstIfStatement= null;
		IfStatement currentIfStatement= null;
		Block currentBlock= null;
		boolean hasStopAsLastExecutableStatement = false;
		Block defaultBlock= null;