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
AST ast= node.getAST();
		StringLiteral leftLiteral= ast.newStringLiteral();
		StringLiteral centerLiteral= ast.newStringLiteral();
		StringLiteral rightLiteral= ast.newStringLiteral();
		try {
			leftLiteral.setEscapedValue('"' + stringValue.substring(1, firstPos) + '"');
			centerLiteral.setEscapedValue('"' + stringValue.substring(firstPos, secondPos) + '"');
			rightLiteral.setEscapedValue('"' + stringValue.substring(secondPos, stringValue.length() - 1)  + '"');
		} catch (IllegalArgumentException e) {
			return false;
		}
		if (resultingCollections == null) {
			return true;
		}
		ASTRewrite rewrite= ASTRewrite.create(ast);
		
		InfixExpression expression= ast.newInfixExpression();
		expression.setOperator(InfixExpression.Operator.PLUS);
		if (firstPos != 1 ) {
			expression.setLeftOperand(leftLiteral);
		}
		if (firstPos == 1) {
			expression.setLeftOperand(centerLiteral);
		} else {
			expression.setRightOperand(centerLiteral);
		}
		if (secondPos < stringValue.length() - 1) {
			if (firstPos == 1) {
				expression.setRightOperand(rightLiteral);
			} else {