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
ASTNode initializerParent= parent.getParent();
			int dim= 1;
			while (initializerParent instanceof ArrayInitializer) {
				initializerParent= initializerParent.getParent();
				dim++;
			}
			Type creationType= null;
			if (initializerParent instanceof ArrayCreation) {
				creationType= ((ArrayCreation) initializerParent).getType();
			} else if (initializerParent instanceof VariableDeclaration) {
				VariableDeclaration varDecl= (VariableDeclaration) initializerParent;
				creationType= ASTNodes.getType(varDecl);
				dim-= ASTNodes.getExtraDimensions(varDecl);
			}
			if (creationType != null) {
				while ((creationType instanceof ArrayType) && dim > 0) {
					creationType= ((ArrayType) creationType).getComponentType();
					dim--;
				}
				return creationType.resolveBinding();
			}
			break;
		case ASTNode.CONDITIONAL_EXPRESSION:
			ConditionalExpression expression= (ConditionalExpression) parent;
			if (node.equals(expression.getExpression())) {
				return parent.getAST().resolveWellKnownType("boolean"); 
			}
			if (node.equals(expression.getElseExpression())) {
				return expression.getThenExpression().resolveTypeBinding();
			}