java.lang.NullPointerException: cannot unbox null value 错误详解 1. 错误含义 java.lang.NullPointerException: cannot unbox null value 这个错误通常发生在Java中将一个可能为null的对象自动拆箱(unboxing)为基本数据类型时。在Java中,基本数据类型(如int, float, boolean等)与它们的包装类(如Integer, Float, ...
然后断点,并且将这句话 add to watch 会出现真正的异常:java.lang.NullPointerException: cannot unbox null value 是因为拆箱的时候对象为空,所以拆箱报错,integer对象到int基本类型会自动拆箱。而integer为空,所以报错。
Cannot convert null to 'int' because it is a value type--need help Cannot convert string[] to string in foreach loop Cannot convert type 'System.Collections.Generic.List<Microsoft.Azure.Cosmos.Table.ITableEntity>' to 'System.Collections.Generic.List<ITableEntity>' Cannot convert type 'System...
iles-app@0.0.0 /Users/paul/Projects/Personal/iles-app ├─┬ iles@0.3.11 │├─┬ @islands/frontmatter@0.0.2 ││├── estree-util-is-identifier-name@1.1.0 ││├─┬ estree-util-value-to-estree@1.3.0 │││└── is-plain-obj@3.0.0 ││├─┬ js-yaml@4.1.0 │││└─...