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
} else if (location == Assignment.LEFT_HAND_SIDE_PROPERTY) {
				Assignment assignment= (Assignment) name.getParent();
				Expression expression= assignment.getRightHandSide();
				int exStart= expression.getStartPosition();
				int exEnd= exStart + expression.getLength();
				
				HashSet overlapNames= new HashSet();
				for (int j= 0; j < linkedNodes.length; j++) {
					SimpleName name2= linkedNodes[j];
					if (name2 == null) {
						continue;
					}
					int name2Start= name2.getStartPosition();
					if (exStart <= name2Start && name2Start < exEnd) {
						overlapNames.add(name2);
					}
				}
				
				SimpleNameRenameProvider provider= new SimpleNameRenameProvider() {
					public SimpleName getRenamed(SimpleName simpleName) {
						if (simpleName.resolveBinding() == variableBinding) {
							renamedNames.add(simpleName);
							return ast.newSimpleName(newIdentifier);
						}
						return null;
					}
				};
				Expression inversedExpression= getInversedBooleanExpression(ast, rewrite, expression, provider);
				
				for (Iterator I= overlapNames.iterator(); I.hasNext();) {