Matlab Java接口-无法将用户定义的类添加到Java类路径

Question

I coded a simple class: test and compiled it and put it in th

'D:\Dropbox\projects\ICPR2013\code\java\union_find'. 

Code:-

public class test {
    public test() {
        System.out.printf("hello world!");
    }
}

And then I use the following code to bring the defined class to the Java class path. I also use javaclasspath to make sure that the folder including 'test' class is added to the Java class path.

javaaddpath('D:\Dropbox\projects\ICPR2013\code\java\union_find');

But when I use x = javaObjectEDT('test'); to call the 'test' class, it gives me the following error: No class test can be located on Java class path

Answer 1

Assuming your class is in the file called test.java, on Ubuntu 14.04 and Matlab 2013a, you can do as follows:

1. Compile your class file using java 6 (ie java version used in Matlab 2013a). Ubuntu 14.04 does not come with this java version. So you need to install it. Instructions are here .

   /usr/lib/jvm/java-6-oracle/bin/javac -d . test.java

2. Make jar file:

   /usr/lib/jvm/java-6-oracle/bin/jar cf test.jar test.class

3. Go to Matlab and add the jar file and run it:

   javaaddpath('/tmp/test.jar');
   test()
   hello world!

Hope this helps.