Three Ways to Call A Simple "Hello World" Java Program in MATLAB

--------------------------- ###Installation Environment Environment ``` Ubuntu 12.04, 64-bit Matlab R2012a, 64-bit ``` --------------------------- ###Install Package Install open JDK and check the version ```bash $ sudo apt-get install openjdk-6-jdk $ sudo apt-get install openjdk-6-jre $ javac -version $ java -version ``` A simple HelloWorld.java code ```java public class HelloWorld { public static void main( String args[] ) { System.out.println( "Hello World!" ); } } ``` --------------------------- ### The First Way Compile and run HelloWorld ```bash $ javac -cp %CLASSPATH:/path/to/matlab/jre HelloWorld.java $ jar -cvf library.jar HelloWorld.class ``` Example1.m ```matlab >> clear all; >> javaaddpath(/path/to/library.jar); >> HelloWorld ``` --------------------------- ### The Second Way Compile and run HelloWorld ```bash $ javac HelloWorld.java # This will produce a HelloWorld.class file $ java HelloWorld ``` Example2.m ```matlab >> java -version % consistent with the java version installed in system >> which classpath.txt % add the path HelloWorld.class to the end of classpath.txt >> javaaddpath(/path/to/matlab/HelloWorld.class); >> o = HelloWorld; >> javaMethod('main', o); ``` --------------------------- ### The Third Way Compile and run HelloWorld ```bash $ javac HelloWorld.java # This will produce a HelloWorld.class file $ java HelloWorld ``` Example3.m ```matlab >> java -version % consistent with the java version installed in system >> which classpath.txt % add the path HelloWorld.class to the end of classpath.txt /usr/local/MATLAB/R2012a/toolbox/local/classpath.txt >> o = HelloWorld; >> javaMethod('main', o, ''); ``` --------------------------- Reference: http://www.mathworks.com/matlabcentral/answers/99993-how-do-i-call-a-simple-hello-world-java-program-in-matlab https://sergiolima.wordpress.com/2009/10/15/using-java-objects-with-matlab/