从何处获取 tools.jar 以与 Java 8 jdk 早期版本一起使用

Question

Where to get tools.jar for Java 8 JDK early release? Without it, my Java 1.8 Maven pom based projects in Netbeans will not compile.

The Java 8 early release is set in the Java Platforms setting and all the Java 8 projects that are not Maven-based will compile and run.

https://jdk8.java.net/download.html

It is not found on the downloads page, I can not find anything in their search.

Does anyone have success compiling Maven pom based projects with the Java 8 early release?

Can the old tools.jar be used or where did you find it?

Answer 1

The tools.jar file on the 1.8.0 JDK is located in jdk1.8.0/lib/tools.jar . If it's not there, then you don't have the JDK installed correctly.

Please see the accepted answer - the tools.jar file was omitted in a specific early access revision ( jdk-8-ea-bin-b106-windows-i586-05_sep_2013.exe ).

Answer 2

You just need to install devel package. On RHEL family it's like this:

# yum install java-1.8.0-openjdk-devel

Answer 3

I had a similar problem when using Hadoop-Common-2.7.2 as a dependency. I resolved the problem by adding the following exclusions to my POM.xml file:

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-common</artifactId>
    <version>2.7.2</version>
    <exclusions>
        <exclusion>
            <groupId>jdk.tools</groupId>
            <artifactId>jdk.tools</artifactId>
        </exclusion>
    </exclusions>
</dependency>

Answer 4

You can download any version of the tools.jar file. For example, it is available from java2s.com . It would be preferable, though, to find it on the official Oracle site, if possible.

After downloading any version of the tools-xxjar file, simply rename it to tools.jar (removing the version number) and place it in the jrex.x/lib folder.

Answer 5

I had a similar problem and found the solution in the Android Public Issue Tracker: tools.jar not packed in lib of Java JDK 8 and Android studio gives tools.jar missing error .

As kn...@gmail.com states in comment #8 , the error appears only when the JDK is not installed in its default directory. The problem is resolved by reinstalling the JDK into its default directory.

Answer 6

确保查看文件夹C:/Program Files/Java/jdk1.8.0_version/lib而不是C:/Program Files (x86)/Java/jdk1.8.0_version/lib

Answer 7

Some JDK packages contain just the Java Runtime Environment.

So for instance in Fedora, Oracle Linux, RHEL, CentOS java-1.8.0-openjdk package contains just the JRE. If you want the development tools, then install the java-1.8.0-openjdk-devel package instead.

And in Debian/Ubuntu openjdk-8-jre package contains just the JRE. If you want the development tools, then install the openjdk-8-jdk package instead.

Answer 8

Answer on the behalf of question author:

This version is missing tools.jar : jdk-8-ea-bin-b106-windows-i586-05_sep_2013.exe

It is now in the most recent release.

Answer 9

When I looked at Eclipse > Window > preference > Java > Installed JRE > , it was pointing to JRE , which seems obvious. However, when I changed it to point to JDK , the compile error was resolved. This is because there is tools.jar in the JDK folder.

Before this, I had tried copying tools.jar from jdk/lib to jre/lib . However, that did not solve the issue.

Answer 10

只需从jdk\\lib文件夹中复制tools.jar并粘贴到jre\\lib文件夹中。

Answer 11

The solution is to update the eclipse.ini file. If no JDK is used for Eclipse, change it:

• Quit Eclipse if it is running
• Go to the Eclipse installation directory and open the file eclipse.ini in a text editor
• Search for the line -vmargs
• Before the line -vmargs , add two lines:
  • On the first line, write -vm
  • On the second line, write the path to your JDK installation (usually something like: C:\\Program Files\\Java\\jdk1.6.0_31\\bin\\javaw.exe on Windows)*

Solution also documented here

Answer 12

文件tools.jar在 Java 9 中被删除。请在此处查看Oracle.com JDK 9 页面上的“删除的工具和组件”

Answer 13

If using Reactive Native:

1. Install the latest JDK from here .

2. If the problem not solved then go back to react-native documentation about installing react native (android) on mac, here

3. In root of your reactnative project:

    cd android ./gradlew clean ./gradlew assembleRelease