blocks|key|725158|text|在gradle项目中，您可以通过以下方式添加此编译参数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|725159|gradle.projectsEvaluated+{
++++tasks.withType(JavaCompile)+{
++++++++options.compilerArgs+<<+"-Xlint:unchecked"
++++}
}|code-block|syntax|javascript|725160|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In gradle project, You can added this compile parameter in the following way:

<pre><code>gradle.projectsEvaluated {
 tasks.withType(JavaCompile) {
 options.compilerArgs &lt;&lt; "-Xlint:unchecked"
 }
}
</code></pre>

blocks|key|508420|text|我知道这听起来很奇怪，但我很确定这是你的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|508421|在MyGui.java中的某个地方，您正在使用泛型集合，而没有指定类型。例如，如果您在某处使用ArrayList，您将执行以下操作：|508422|List+list+=+new+ArrayList();|code-block|syntax|javascript|508423|当你应该这样做的时候：|508424|List<String>+list+=+new+ArrayList<String>();|508425|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I know it sounds weird, but I'm pretty sure this is your problem:

Somewhere in MyGui.java you're using a generic collection without specifying the type. For example if you're using an ArrayList somewhere, you are doing this:

<pre><code>List list = new ArrayList();
</code></pre>

When you should be doing this:

<pre><code>List&lt;String&gt; list = new ArrayList&lt;String&gt;();
</code></pre>

blocks|key|508780|text|gradle还有另一种方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|508781|compileJava+{
++++options.compilerArgs+<<+"-Xlint:unchecked"+<<+"-Xlint:deprecation"
}|code-block|syntax|javascript|508782|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

There is another way for gradle:

<pre><code>compileJava {
 options.compilerArgs &lt;&lt; "-Xlint:unchecked" &lt;&lt; "-Xlint:deprecation"
}
</code></pre>

blocks|key|508927|text|对于Android+Studio，将以下代码添加到allprojects块中的顶级build.gradle文件中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|508928|tasks.withType(JavaCompile)+{
++++options.compilerArgs+<<+"-Xlint:unchecked"+<<+"-Xlint:deprecation"+
}|code-block|syntax|javascript|508929|entityMap^0|P|B|15|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

For Android Studio add the following to your top-level <code>build.gradle</code> file within the <code>allprojects</code> block

<pre><code>tasks.withType(JavaCompile) {
 options.compilerArgs &lt;&lt; "-Xlint:unchecked" &lt;&lt; "-Xlint:deprecation" 
}
</code></pre>

blocks|key|724984|text|在CMD中，写入：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|724985|javac+-Xlint:unchecked+MyGui2.java|code-block|syntax|javascript|724986|它将显示未选中或不安全操作的列表。|724987|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

In CMD, write:

<pre><code>javac -Xlint:unchecked MyGui2.java
</code></pre>

it will display the list of unchecked or unsafe operations.

blocks|key|508652|text|如果使用像NetBeans这样的集成开发环境，可以在项目的属性中指定Xlint:unchecked编译器选项。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|508653|只需转到项目窗口，在项目中右击，然后在Properties中单击。|508654|在出现的窗口中搜索Compiling类别，然后在标记为Additional+Compiler+Options的文本框中设置Xlint:unchecked选项。|508655|因此，每次编译项目时，该设置都将保持不变。|508656|entityMap^0|Y|F|0|J|A|0|9|9|R|R|1P|F|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|10|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|M|$]]

If you work with an IDE like NetBeans, you can specify the <code>Xlint:unchecked</code> compiler option in the propertys of your project.

Just go to projects window, right click in the project and then click in <code>Properties</code>.

In the window that appears search the <code>Compiling</code> category, and in the textbox labeled <code>Additional Compiler Options</code> set the <code>Xlint:unchecked</code> option.

Thus, the setting will remain set for every time you compile the project.

blocks|key|508565|text|通过命令行使用-Xlint:unchecked进行编译的其他方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|508566|javac+abc.java+-Xlint:unchecked|code-block|syntax|javascript|508567|它将显示未选中和不安全的警告。|508568|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

other way to compile using -Xlint:unchecked through command line
<pre><code>javac abc.java -Xlint:unchecked
</code></pre>
it will show the unchecked and unsafe warnings.

blocks|key|725324|text|指定Gradle编译器参数的一种更简洁的方法如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|725325|compileJava.options.compilerArgs+=+['-Xlint:unchecked','-Xlint:deprecation']|code-block|syntax|javascript|725326|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A cleaner way to specify the Gradle compiler arguments follow:
<pre><code>compileJava.options.compilerArgs = ['-Xlint:unchecked','-Xlint:deprecation']
</code></pre>

blocks|key|508831|text|仅供参考，IntelliJ+15的这些设置已经更改，新的和改进的，甚至更深的埋藏！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|508832|现在是:文件>其他设置>默认设置>‘构建、执行、部署’>编译器>+Java编译器|508833|和前面一样，在其他命令行参数中写入"-Xlint:unchecked“。|508834|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

FYI getting to these settings has changed for IntelliJ 15, new and improved for even deeper burial!

Now it's: File > Other Settings > Default Settings > 'Build, Execution, Deployment' > Compiler > Java Compiler 

And in Additional command line parameters, same as before, write "-Xlint:unchecked".

I'm getting a message when I compile my code:

<pre><code>Note: H:\Project2\MyGui2.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
</code></pre>

How do I recompile with <code>-Xlint:unchecked</code>?

How do I compile with -Xlint:unchecked?

当我编译我的代码时，我收到一条消息：Note: H:\Project2\MyGui2.java uses unchecked or unsafe operations.Note: Recompile with -Xlint:unchecked for details.如何使用-Xlint:unchecked重新编译

问如何使用-Xlint:unchecked进行编译？
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