An example for using the Java library in your code is given below.

package org.conqat.lib.simulink;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.zip.ZipException;

import javax.imageio.ImageIO;

import org.conqat.lib.commons.logging.SimpleLogger;
import org.conqat.lib.simulink.builder.SimulinkModelBuilder;
import org.conqat.lib.simulink.builder.SimulinkModelBuildingException;
import org.conqat.lib.simulink.model.SimulinkBlock;
import org.conqat.lib.simulink.model.SimulinkModel;
import org.conqat.lib.simulink.util.SimulinkBlockRenderer;

public class SimulinkDemo {
  
  public static void main(String[] args)
      throws SimulinkModelBuildingException, ZipException, IOException {
    File file = new File(args[0]);
    try (SimulinkModelBuilder builder = new SimulinkModelBuilder(file,
        new SimpleLogger())) {
      SimulinkModel model = builder.buildModel();

      // list all blocks in the model
      for (SimulinkBlock block : model.getSubBlocks()) {
        System.out.println("Block: " + block.getName());
      }

      // render a block or model as PNG image
      SimulinkBlockRenderer simulinkBlockRenderer = new SimulinkBlockRenderer();
      BufferedImage image = simulinkBlockRenderer.renderBlock(model);
      ImageIO.write(image, "PNG", new File(file.getPath() + ".png"));
    }
  }
}