Java 如何在 IntelliJ IDEA 中从 -source 1.6 更改为 -source 7
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How to change from -source 1.6 to -source 7 in IntelliJ IDEA
提问by El Marce
I' trying to build a in IntelliJ IDEA project that is not mine and I got the following error:
我试图在 IntelliJ IDEA 中构建一个不是我的项目，但出现以下错误：
java: diamond operator is not supported in -source 1.6 (use -source 7 or higher to enable diamond operator)
java: -source 1.6 不支持菱形运算符（使用 -source 7 或更高版本启用菱形运算符）
How do I change this setting in IntelliJ IDEA?
如何在 IntelliJ IDEA 中更改此设置？
采纳答案by Ori Dar
Ctrl+Alt+Shift+S (Project Structure icon)
Ctrl+Alt+Shift+S（项目结构图标）
Then change Project language level
然后更改项目语言级别
回答by senseiwu
File -> Project Structure -> Sources -> Language level
文件 -> 项目结构 -> 来源 -> 语言级别
You will have to reload IDEA
您将不得不重新加载 IDEA
回答by Allen
I know the OP uses IntelliJ IDEA, but Android Studio is based on IntelliJ IDEA, so I wanna say one more word.
我知道 OP 使用 IntelliJ IDEA，但 Android Studio 是基于 IntelliJ IDEA，所以我想多说一句。
If you use Android Studio, command+;(for Mac) or File->Project Structure, then in the open window follow the settings:
如果您使用 Android Studio、command+;（适用于 Mac）或File->Project Structure，则在打开的窗口中进行设置：
回答by WeirdElfB0y
For me, changing the Language Level in Project Structure and restarting IDEA didn't help.
对我来说，更改项目结构中的语言级别并重新启动 IDEA 并没有帮助。
I had to edit the build.gradlein coremodule and change the source compatibility from 1.6 to 1.7:
我必须编辑build.gradleincore模块并将源兼容性从 1.6 更改为 1.7：
apply plugin: "java"
sourceCompatibility = 1.7 //changed from 1.6
[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
sourceSets.main.java.srcDirs = [ "src/" ]
eclipse.project {
name = appName + "-core"
}
Build -> Clean Project
构建 -> 清理项目
回答by Sarah Phillips
And, if you're working with a maven project, for sanity, remember to set the java version in the pom too.
而且，如果您正在使用 Maven 项目，为了理智起见，请记住也在 pom 中设置 java 版本。
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
回答by NecipAllef
For me, above answers didn't work, although they helped me solve my issue. At module level build.gradledo the following:
对我来说，上述答案不起作用，尽管它们帮助我解决了我的问题。在模块级别build.gradle执行以下操作：
compileOptions {
// I've changed below values from VERSION_1_6 to VERSION_1_7
sourceCompatibility JavaVersion.VERSION_1_7
targetCompatibility JavaVersion.VERSION_1_7
}
回答by ketankk
File->Project structure->Project Settings->Modules->Language level
File->Project structure->Project Settings->Modules->Language level
Change level using drop down.
使用下拉菜单更改级别。
Otherwise, If you are using maven for build,
否则，如果您使用 maven 进行构建，
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
