public void loadHintText() {
        BitmapText hintText = new BitmapText(guiFont);
        hintText.setSize(guiFont.getCharSet().getRenderedSize());
        hintText.setLocalTranslation(0, getCamera().getHeight(), 0);
        hintText.setText("Hit T to save, and Y to load");
        guiNode.attachChild(hintText);
    }
Create the save and load actions and add them to the input listener
jme3-examples/src/main/java/jme3test/terrain/TerrainTestReadWrite.java