Confused about Scrollbar class

[Jagruti23]

Hello guys,

I need you help to get solution over my java related query. I have to use Scrollbar class in my java project. But unfortunately I don't have enough knowledge about the 'Scrollbar class'. I have referred many java reference books , but didn't get enough details. I wonder if you let me know something about the Scrollbar class along with proper example code. I am waiting for your reply.

[opaper]

The Scrollbar class embodies a scroll bar, a familiar user-interface object. A scroll bar provides a convenient means for allowing a user to select from a range of values. Normally, the user changes the value of the scroll bar by making a gesture with the mouse. For example, the user can drag the scroll bar's bubble up and down, or click in the scroll bar's unit increment or block increment areas. Keyboard gestures can also be mapped to the scroll bar. By convention, the Page Up and Page Down keys are equivalent to clicking in the scroll bar's block increment and block decrement areas.

[MindSpace]

Hi,

Please review below example of Scrollbar class:

import java.awt.BorderLayout;
java.awt.Scrollbar;
import java.awt.event.AdjustmentListener;

public class ScrollbarDM extends 
{  JLabel label;
  public SwingScrollBarExample() {
    super(true);
    label = new JLabel();
    setLayout(new BorderLayout());
    JScrollBar hbar1 = new JScrollBar(JScrollBar.HORIZONTAL, 30, 20, 0, 300);
    hbar1.setUnitIncrement(2);
    hbar1.setBlockIncrement(1);
    hbar1.addAdjustmentListener(new MyAdjustmentListener());
    add(hbar1, BorderLayout.SOUTH);
    }
  class MyAdjustmentListener implements AdjustmentListener {
    public void adjustmentValueChanged(AdjustmentEvent e) {
      label.setText(" New Value is " + e.getValue() + "      ");
      repaint();
    }  }
  public static void main(String sgt[]) {
    JFrame frameC = new JFrame("Scroll Bar Example");
    frameC.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     frameC.setSize(300, 200);
    frameC.setVisible(true);
  }
}

[Modifier]

Hello friends,

Below I have given some methods of Scrollbar class along with their parameters:

• setVisibleAmount(int newAmt)
• setValues(int val, int visible, int min1, int max1)
• setValueIsAdjusting(boolean bln)
• setUnitIncrement(int val)
• setOrientation(int ortn)

[Praetor]

Example of Scrollbar class of java language:

java.awt.Scrollbar
import java.awt.BorderLayout;
import javax.swing.JFrame;

public class ScrollBarSample
 {
  public static void main(String argsf[]) 
{
    JScrollBar oneJScrollBar1 = new JScrollBar(JScrollBar.HORIZONTAL);
    String title1 = (args.length == 0 ? "ScrollBar Sample" : args[0]);
    JFrame frame01 = new JFrame(title);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame01.getContentPane();
    contentPane.add(oneJScrollBar, BorderLayout.NORTH);
    frame01.setSize(300, 44);
    frame01.setVisible(true);
  }
}

[Katty]

Hi friend,

There are total four nested class available with Scrollbar class, and which are mentioned below:

* Scrollbar.AccessibleAWTScrollBar
* Component.FlipBufferStrategy
* Component.AccessibleAWTComponen
* Component.BltBufferStrategy