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
body= ((IfStatement) node.getParent()).getThenStatement();
		} else if (locationInParent == WhileStatement.EXPRESSION_PROPERTY) {
			body= ((WhileStatement) node.getParent()).getBody();
		}
		if (body == null) {
			return false;
		}
		Type originalType= expression.getRightOperand();
		if (originalType.resolveBinding() == null) {
			return false;
		}
		
		if (resultingCollections == null) {
			return true;
		}
		final String KEY_NAME= "name"; 
		final String KEY_TYPE= "type"; 
		
		AST ast= expression.getAST();
		ASTRewrite rewrite= ASTRewrite.create(ast);
		ICompilationUnit cu= context.getCompilationUnit();
		
		String label= CorrectionMessages.AdvancedQuickAssistProcessor_castAndAssign;
		Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_LOCAL);
		LinkedCorrectionProposal proposal= new LinkedCorrectionProposal(label, cu, rewrite, 7, image);
		
		String[] varNames= suggestLocalVariableNames(cu, originalType.resolveBinding());
		for (int i= 0; i < varNames.length; i++) {
			proposal.addLinkedPositionProposal(KEY_NAME, varNames[i], null);
		}