问题
Working with IDE like NetBeans or IDEA, i've seen that they are converting generic types into this symbol:
private final List<String> ar = new ArrayList<~>();
But using this in a simple editor results in throwing an error. BTW Eclipse also doesn't like it. Is it somehow connected with type erasure mechanism?
回答1:
You will see that in IntelliJ its a different colour!
This is because it has used code folding to hide the code, but you can't write it this way in Java 6.
In Java 7 you can write
private final List<String> ar = new ArrayList<>();
来源：https://stackoverflow.com/questions/9915280/generic-syntax-symbol