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
return 3;
		}
		if ((operator == InfixExpression.Operator.PLUS) || (operator == InfixExpression.Operator.MINUS)) {
			return 4;
		}
		if ((operator == InfixExpression.Operator.LEFT_SHIFT)
				|| (operator == InfixExpression.Operator.RIGHT_SHIFT_SIGNED)
				|| (operator == InfixExpression.Operator.RIGHT_SHIFT_UNSIGNED)) {
			return 5;
		}
		if ((operator == InfixExpression.Operator.LESS) || (operator == InfixExpression.Operator.GREATER)
				|| (operator == InfixExpression.Operator.LESS_EQUALS)
				|| (operator == InfixExpression.Operator.GREATER_EQUALS)) {
			return 6;
		}
		if ((operator == InfixExpression.Operator.EQUALS) || (operator == InfixExpression.Operator.NOT_EQUALS)) {
			return 7;
		}
		if (operator == InfixExpression.Operator.AND) {
			return 8;
		}
		if (operator == InfixExpression.Operator.XOR) {
			return 9;
		}
		if (operator == InfixExpression.Operator.OR) {
			return 10;
		}
		if (operator == InfixExpression.Operator.CONDITIONAL_AND) {
			return 11;
		}