The import “javax.jnlp” cannot be resolved

问题:

I am learning Java and trying to run some examples using Java web start.

However, I cannot seem to find that package javax.jnlp.

This same error is haunting me on both windows and linux.I've installed oracle jdk 7 on windows.OpenJDK 1.6 is the version installed on linux.

Searching the internet for the package with no luck.It is no longer available on oracle's website because they insist that the package is a part of the jdk.

I've searched the installation directories for it.some claim it is in the jnlp.jar file, others claim in javaws.jar file...neither files are part of my installation.

回答1:

From the Oracle page:

The jardiff tool, jnlp-servlet.jar file, and jnlp.jar file can be found in the samples directory of the JDK.

On my comp it is in:

... /jdk1.6.0_23/sample/jnlp/servlet/jnlp.jar

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For Java 7 you have to download Demos and Samples separately:

Windows x86 (32-bit) 15.62 MB jdk-7u4-windows-i586-demos.zip

Windows x64 (64-bit) 15.69 MB jdk-7u4-windows-x64-demos.zip

You will find jnlp.jar inside: jdk1.7.0_04\sample\jnlp\servlet\jnlp.jar

回答2:

Can be found in jre/lib/javaws.jar in 1.7 and 1.8, as per: https://stackoverflow.com/a/13555413/829305

The jre/ directory can be found inside the jdk/ directory if you've only got the JDK installed.

回答3:

You should add the path to javaws.jar file in your classpath. For example: "javac -classpath .:/path/to/javaws.jar webstart/*.java"