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
Object o= I.next();
					if (!renamedNames.contains(o)) {
						return false;
					}
				}
				
				Assignment.Operator operator= assignment.getOperator();
				if (operator == Assignment.Operator.BIT_AND_ASSIGN) {
					Assignment newAssignment= ast.newAssignment();
					newAssignment.setLeftHandSide(newName);
					newAssignment.setRightHandSide(inversedExpression);
					newAssignment.setOperator(Assignment.Operator.BIT_OR_ASSIGN);
					rewrite.replace(assignment, newAssignment, null);
				} else if (operator == Assignment.Operator.BIT_OR_ASSIGN) {
					Assignment newAssignment= ast.newAssignment();
					newAssignment.setLeftHandSide(newName);
					newAssignment.setRightHandSide(inversedExpression);
					newAssignment.setOperator(Assignment.Operator.BIT_AND_ASSIGN);
					rewrite.replace(assignment, newAssignment, null);
				} else {
					rewrite.replace(expression, inversedExpression, null);
					
					rewrite.replace(name, newName, null);
				}
			} else if (location == VariableDeclarationFragment.NAME_PROPERTY) {
				
				VariableDeclarationFragment vdf= (VariableDeclarationFragment) name.getParent();
				Expression expression= vdf.getInitializer();
				if (expression != null) {
					rewrite.replace(expression, getInversedBooleanExpression(ast, rewrite, expression), null);