空指针提示

Jin小于 1 分钟

    @Test
    public void jinTest(){
        List list = null;
        list.size();
    }

JDK17 执行后报错信息

java.lang.NullPointerException: Cannot invoke "java.util.List.size()" because "list" is null

JDK8 执行后报错信息

Exception in thread "main" java.lang.NullPointerException
	at com.jin.NullPointerHint.jinTest(NullPointerHint.java:18)

注意：JDK17 有 "list" is null

# 空指针提示