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代码排版、修改错别字 #52

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Jun 1, 2016
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5 changes: 3 additions & 2 deletions 5 contents/avoiding-null-statements-in-java.md
Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,8 @@ if (parser == null) {
}
Action action = parser.findAction(someInput);
if (action == null) {
// do nothing} else {
// do nothing}
else {
action.doSomething();}
```

Expand All @@ -95,7 +96,7 @@ ParserFactory.getParser().findAction(someInput).doSomething();
而不是
`foo.equals("bar") `
- Java8或者guava lib中,提供了Optional类,这是一个元素容器,通过它来封装对象,可以减少判空。不过代码量还是不少。不爽。
- 如果你想返回null,请挺下来想一想,这个地方是否更应该抛出一个异常
- 如果你想返回null,请停下来想一想,这个地方是否更应该抛出一个异常

stackoverflow链接:
http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java?page=2&tab=votes#tab-top
Morty Proxy This is a proxified and sanitized view of the page, visit original site.