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Java8特性① Lambda 表达式:https://www.jianshu.com/p/4b6a875694f0?utm_campaign=maleskine&utm_content=note&utm_medium=seo_notes&utm_source=recommendation
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以前一直在C#里面用lambda表达式,java同样也有,允许把函数作为一个方法的参数传递进方法中。
Lambda表达式的基本结构:
(arg1, arg2...) -> { body }
(type1 arg1, type2 arg2...) -> { body }
1. 表达式特征:(网上抄一下)
可选类型声明:不需要声明参数类型,编译器可以统一识别参数值。
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It would be cool to use the java8 lambda notation provided by [io.cucumber:cucumber-java8](https://github.com/cucumber/cucumber-jvm/tree/master/java8) to define steps:
```
Given("^the erp-produ…
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## Summary
When compiling a language project, several annotation processor (such as dagger) are executed.
However, (error) messages from annotation processors are not reported in the editor.
## …
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I installed java8 and use gradlew.bat to build an android apk.
Here is what console shows me :
![image](https://github.com/wolpi/prim-ftpd/assets/56549016/819debd2-d2cc-4cbc-bc53-4058735c0b75)
But …
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## Background
The implementation of the `java.sql.Timestamp` causes some confusion today, because this class might contain a timezone (extends java.util.Date). The timezone is implicitly set in the…
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## 构建方法
`of`: 为非`null`的值创建一个`optional`,如果传入参数为`null`,则抛出`NullPointerException `
```
//调用工厂方法创建Optional实例
Optional name = Optional.of("Sanaulla");
//传入参数为null,抛出NullPointerException.
Optional s…
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Let say that we have
1. source properties (and beans): `A, A.a1, A.a1.a11`
2. and target properties `ADto, ADto.adto1, ADto.adto1.adto11`
`1`, `11` representing nesting levels, `1` 1 deep, `11` 2…
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http://huyan.couplecoders.tech/java8/java/2018/03/10/java8-lambda%E8%A1%A8%E8%BE%BE%E5%BC%8F/
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The following code will work as expected with the real Jackson library but it will fail will gwt-jackson.
```java
public static interface InterfaceBean {
@JsonIgnore
default St…