Get Vertical Scroll Bar Value

if(jScrollPane1.getVerticalScrollBar() != null){
    System.out.println("Current Value: "+jScrollPane1.getVerticalScrollBar().getValue());
}

Get Minimum Vertical Scroll Bar Value

if(jScrollPane1.getVerticalScrollBar() != null){
    System.out.println("Minimum Value: "+jScrollPane1.getVerticalScrollBar().getMinimum());
}

Get Maximum Vertical Scroll Bar Value

if(jScrollPane1.getVerticalScrollBar() != null){
    int max = jScrollPane1.getVerticalScrollBar().getMaximum();
    int extentHeight = (int)jScrollPane1.getViewport().getExtentSize().getHeight();
    if ((max - extentHeight) >= 0) {
        System.out.println("Maximun Value: " + (max - extentHeight));
    } else {
        System.out.println("Maximun Value: 0");
    }
}

Set Vertical Scroll Bar to Minimum Value

if(jScrollPane1.getVerticalScrollBar() != null){
    jScrollPane1.getVerticalScrollBar().setValue(jScrollPane1.getVerticalScrollBar().getMinimum()));
}

Set Vertical Scroll Bar to Middle Value

if(jScrollPane1.getVerticalScrollBar() != null){
    int max = jScrollPane1.getVerticalScrollBar().getMaximum();
    int extentHeight = (int)jScrollPane1.getViewport().getExtentSize().getHeight();
    int midValue = (jScrollPane1.getVerticalScrollBar().getMinimum() + (max-extentHeight))/2;
    jScrollPane1.getVerticalScrollBar().setValue(midValue);
}

Set Vertical Scroll Bar to Maximum Value

if(jScrollPane1.getVerticalScrollBar() != null){
    jScrollPane1.getVerticalScrollBar().setValue(jScrollPane1.getVerticalScrollBar().getMaximum());
}

Get Visible Height of Vertical Scroll Bar (i.e. Extent)

if(jScrollPane1.getVerticalScrollBar() != null){
    System.out.println("Extent Value: "+jScrollPane1.getVerticalScrollBar().getVisibleAmount());
}

Set the Visible Vertical Scroll Bar Amount (Extent)

if(jScrollPane1.getVerticalScrollBar() != null){
    jScrollPane1.getVerticalScrollBar().setVisibleAmount(50);
}

Note:
    Not really useful to change since it will just be reset during any modification
    to the Viewport height.

Get Vertical Scroll Bar Unit Increment

if(jScrollPane1.getVerticalScrollBar() != null){
    System.out.println("Unit Increment Value: "+jScrollPane1.getVerticalScrollBar().getUnitIncrement());
}

Description:
    The amount of movement from a single click on the knob (i.e. scroll button).

Note:
    Mouse Wheel Scrolling amount (sort of???):

        int unitCounter = (int)(block/unit);

        unitCounter is then reset to the closest of these values: 1,2,3 //for Windows

        int scrollAmount = unitCounter*unit;

Set Vertical Scroll Bar Unit Increment

if(jScrollPane1.getVerticalScrollBar() != null){
    jScrollPane1.getVerticalScrollBar().setUnitIncrement(47);
}

Description:
    The amount of movement from a single click on the scrolling button.

Reset:
    if(jScrollPane1.getVerticalScrollBar() != null){
        jScrollPane1.getVerticalScrollBar().setUnitIncrement(1);
    }

Note:
    Mouse Wheel Scrolling amount (sort of???):

        int unitCounter = (int)(block/unit);

        unitCounter is then reset to the closest of these values: 1,2,3 //for Windows

        int scrollAmount = unitCounter*unit;

Get Vertical Scroll Bar Block Increment

if(jScrollPane1.getVerticalScrollBar() != null){
    System.out.println("Block Increment Value: "+jScrollPane1.getVerticalScrollBar().getBlockIncrement());
}

Description:
    The amount of movement from a single click on the scrollbar track.

Note:
    Mouse Wheel Scrolling amount (sort of???):

        int unitCounter = (int)(block/unit);

        unitCounter is then reset to the closest of these values: 1,2,3 //for Windows

        int scrollAmount = unitCounter*unit;

Set Vertical Scroll Bar Block Increment

if(jScrollPane1.getVerticalScrollBar() != null){
    jScrollPane1.getVerticalScrollBar().setBlockIncrement(33);
}

Description:
    The amount of movement from a single click on the scrollbar track.

Reset (sort of????)):
    if(jScrollPane1.getVerticalScrollBar() != null){
        jScrollPane1.getVerticalScrollBar().setBlockIncrement(10);
    }

Note:
    Mouse Wheel Scrolling amount (sort of???):

        int unitCounter = (int)(block/unit);

        unitCounter is then reset to the closest of these values: 1,2,3 //for Windows

        int scrollAmount = unitCounter*unit;

Set the Vertical Scroll Bar Policy

if (jScrollPane1.getVerticalScrollBar() != null) {
    jScrollPane1.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
}

Note:
    ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER
    ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS
    ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED //default

Set Vertical Scroll Bar Orientation

if (jScrollPane1.getVerticalScrollBar() != null) {
    jScrollPane1.getVerticalScrollBar().setOrientation(JScrollBar.HORIZONTAL);
}

Note:
    JScrollBar.HORIZONTAL
    JScrollBar.VERTICAL   //default

Set Vertical Scroll Bar Width

if (jScrollPane1.getVerticalScrollBar() != null) {
    jScrollPane1.getVerticalScrollBar().setPreferredSize(new Dimension(100, 5));
    jScrollPane1.getVerticalScrollBar().revalidate();
}

Reset:
    if (jScrollPane1.getVerticalScrollBar() != null) {
        jScrollPane1.getVerticalScrollBar().setPreferredSize(null);
        jScrollPane1.getVerticalScrollBar().revalidate();
    }