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
VariableDeclarationFragment frag= (VariableDeclarationFragment) covering.getParent();
			Expression assignee= frag.getName();
			ifStatement.setThenStatement(createAssignmentStatement(rewrite, assignee, conditional.getThenExpression()));
			ifStatement.setElseStatement(createAssignmentStatement(rewrite, assignee, conditional.getElseExpression()));
			rewrite.set(frag, VariableDeclarationFragment.INITIALIZER_PROPERTY, null, null); 
			ASTNode statement= frag.getParent();
			rewrite.getListRewrite(statement.getParent(), Block.STATEMENTS_PROPERTY).insertAfter(ifStatement, statement, null);
		}
		
		String label= CorrectionMessages.AdvancedQuickAssistProcessor_replaceConditionalWithIf;
		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 getInverseLocalVariableProposals(IInvocationContext context,
			ASTNode covering,
			Collection resultingCollections) {
		final AST ast= covering.getAST();
		
		if (!(covering instanceof SimpleName)) {
			return false;
		}
		SimpleName coveringName= (SimpleName) covering;
		if (!coveringName.isDeclaration()) {
			return false;
		}
		
		final IBinding variableBinding= coveringName.resolveBinding();
		if (!(variableBinding instanceof IVariableBinding)) {