Bug 82940 [quick fix] Missing sensible conversion suggestion
For this code > % cat Test.java import java.util.Collections; import java.util.List; public class Test { interface Wrapper { int doit(); } private static final List<Wrapper> STD_WRAPPERS = Collections.singletonList ((Wrapper)new Wrapper() { public int doit() { return 0; } }); private static final List<Wrapper> STD_WRAPPERS2 = Collections.singletonList (new Wrapper() { public int doit() { return 0; } }); } The value passed Collections.singletonList is actually of the right type so a sensible conversion would be to put in the cast (see the difference between the 2 statics). The current quick fixes offered assume the type being assigned to is wrong (when infact it is right). A useful quick fix would be to cast the parameter to the right type to give the left type (this would help with any 1 arg method of the form X<T> method(T)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/ASTResolving.java
return expression.getElseExpression().resolveTypeBinding();
		case ASTNode.POSTFIX_EXPRESSION:
			return parent.getAST().resolveWellKnownType("int"); 
		case ASTNode.PREFIX_EXPRESSION:
			if (((PrefixExpression) parent).getOperator() == PrefixExpression.Operator.NOT) {
				return parent.getAST().resolveWellKnownType("boolean"); 
			}
			return parent.getAST().resolveWellKnownType("int"); 
		case ASTNode.IF_STATEMENT:
		case ASTNode.WHILE_STATEMENT:
		case ASTNode.DO_STATEMENT:
			if (node instanceof Expression) {
				return parent.getAST().resolveWellKnownType("boolean"); 
			}
			break;
		case ASTNode.SWITCH_STATEMENT:
			if (((SwitchStatement) parent).getExpression().equals(node)) {
				return parent.getAST().resolveWellKnownType("int"); 
			}
			break;
		case ASTNode.RETURN_STATEMENT:
			MethodDeclaration decl= ASTResolving.findParentMethodDeclaration(parent);
			if (decl != null && !decl.isConstructor()) {
				return decl.getReturnType2().resolveBinding();
			}
			break;
		case ASTNode.CAST_EXPRESSION:
			return ((CastExpression) parent).getType().resolveBinding();
		case ASTNode.THROW_STATEMENT:
		case ASTNode.CATCH_CLAUSE: