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
return false;
		}
		
		ASTNode fullyCoveredNode= (ASTNode) coveredNodes.get(0);
		Expression expression= getBooleanExpression(fullyCoveredNode);
		if (expression == null) {
			return false;
		}
		
		if (resultingCollections == null) {
			return true;
		}
		
		AST ast= expression.getAST();
		final ASTRewrite rewrite= ASTRewrite.create(ast);
		
		Expression inversedExpression= getInversedBooleanExpression(ast, rewrite, expression);
		
		ParenthesizedExpression parenthesizedExpression = ast.newParenthesizedExpression();
		parenthesizedExpression.setExpression(inversedExpression);
		
		PrefixExpression prefixExpression = ast.newPrefixExpression();
		prefixExpression.setOperator(PrefixExpression.Operator.NOT);
		prefixExpression.setOperand(parenthesizedExpression);
		
		rewrite.replace(expression, prefixExpression, null);
		
		String label= CorrectionMessages.AdvancedQuickAssistProcessor_pullNegationUp;
		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
		ASTRewriteCorrectionProposal proposal= new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, 1, image);