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
ifParentStructure = ifParentStructure.getParent();
		}
		
		if (!(ifParentStructure instanceof ForStatement) && !(ifParentStructure instanceof WhileStatement)) {
			return false;
		}
		if ((ifParentBlock != null)
				&& (ifParentBlock.statements().indexOf(ifStatement) != ifParentBlock.statements().size() - 1)) {
			return false;
		}
		
		if (resultingCollections == null) {
			return true;
		}
		
		AST ast = coveringStatement.getAST();
		ASTRewrite rewrite = ASTRewrite.create(ast);
		
		Expression inversedExpression = getInversedBooleanExpression(ast, rewrite, ifStatement.getExpression());
		IfStatement newIf = ast.newIfStatement();
		newIf.setExpression(inversedExpression);
		newIf.setThenStatement(ast.newContinueStatement());
		
		if (ifParentBlock == null) {
			
			ifParentBlock = ast.newBlock();
			ifParentBlock.statements().add(newIf);
			for (Iterator I = getUnwrappedStatements(ifStatement.getThenStatement()).iterator(); I.hasNext();) {
				Statement statement = (Statement) I.next();
				ifParentBlock.statements().add(rewrite.createMoveTarget(statement));