'Using internal sun classes with javac

Is there a way to disable restrictions of javac 1.6.0_22 that prevent me from using JRE internal classes like sun.awt.event.* ?

I'm not looking for:

  1. an explanation why it is forbidden.
  2. suggestion to use different classes
  3. suggestion to use reflection
  4. suggestion to use ecj/eclipse

I just want to know if it is possible or not, and if it is then how.

javajavacinternal


Solution 1:[1]

In addition to the answer by @marcin-wisnicki if you're using Maven, note that the compiler plugin will silently drop any -XD flags, unless you also specify <fork>true</fork>: e.g.

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
                <compilerArgs>
                    <arg>-XDignore.symbol.file</arg>
                </compilerArgs>
                <fork>true</fork>
            </configuration>
            ...

Solution 2:[2]

There's a better solution. First add the option to javac -XDenableSunApiLintControl and then use @SupressWarnings("sunapi") in your code.

Solution 3:[3]

Normally, this only produces a Warning message; e.g.

[javac] /media/disk/opensso2/opensso/products/federation/openfm/source/com/sun/identity/wss/xmlsig/WSSSignatureProvider.java:46: warning: com.sun.org.apache.xpath.internal.XPathAPI is Sun proprietary API and may be removed in a future release
[javac] import com.sun.org.apache.xpath.internal.XPathAPI;

Perhaps you have told the Java compiler to treat warnings as errors.

Solution 4:[4]

If you are using Gradle, you need to use these options

compileJava {
    // enable using internal libraries
    options.fork = true
    options.forkOptions.executable = 'javac'
    options.compilerArgs << '-XDignore.symbol.file' }

Solution 5:[5]

Another way is change jdk.

In my case project java version 1.8. I used from jdk 11. Therefore This error has found in my project. So I changed my jdk from 11 to 1.8. It has worked for me.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 davidxxx
Solution 2 juancn
Solution 3 Stephen C
Solution 4 Kamiel Ahmadpour
Solution 5 Orifjon Yunusjanov

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