How to use

com.jme3.terrain.heightmap.HillHeightMap

constructor

public void randomizeHeightMap()
{
  if(terrain != null)
  {
    try
    {
      HillHeightMap heightmap    = new HillHeightMap(513, 2000, 25, 100, (long)((byte)100 * Math.random()));
      Material mat = terrain.getMaterial();
      Vector3f scale = terrain.getLocalScale();
      Vector3f trans = terrain.getLocalTranslation();
      rootNode.detachChildNamed("Terrain");
      terrain = new TerrainQuad("Terrain", 65, 513, heightmap.getHeightMap());
      terrain.setLocalTranslation(trans);
      terrain.setLocalScale(scale);
      terrain.setMaterial(mat);
      terrain.setShadowMode(ShadowMode.Receive);
      rootNode.attachChild(terrain);
    }
    catch(Exception ex)
    {
      ex.printStackTrace();
    }
  }
}

heightmap = new HillHeightMap(tiles+1, iterations, minradius, maxradius, (byte) seed);
terrain = new TerrainQuad("Terrain", 65, tiles+1, heightmap.getHeightMap());