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
if ((block.statements().size() == 1) && (block.statements().get(0) instanceof IfStatement)) {
					innerIf = (IfStatement) block.statements().get(0);
				}
			}
			if ((innerIf != null) && (innerIf.getElseStatement() == null)) {
				if (resultingCollections == null) {
					return true;
				}
				
				AST ast = statement.getAST();
				ASTRewrite rewrite = ASTRewrite.create(ast);
				
				Expression innerCondition = (Expression) rewrite.createCopyTarget(innerIf.getExpression());
				Expression outerCondition = (Expression) rewrite.createCopyTarget(ifStatement.getExpression());
				
				rewrite.replace(innerIf.getExpression(), outerCondition, null);
				rewrite.replace(ifStatement.getExpression(), innerCondition, null);
				
				String label = CorrectionMessages.AdvancedQuickAssistProcessor_exchangeInnerAndOuterIfConditions_description;
				Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
				ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label,
						context.getCompilationUnit(), rewrite, 1, image);
				resultingCollections.add(proposal);
				result = true;
			}
		}
		return result;
	}
	private static boolean getExchangeOperandsProposals(IInvocationContext context, ASTNode node,
			Collection resultingCollections) {