Sushil's Blog on Programming Tutorials

ScrollColor.java
import java.awt.event.AdjustmentEvent;
import java.awt.FlowLayout;
import java.awt.Color;
import javax.swing.JButton;
import javax.swing.JScrollBar;
import javax.swing.JLabel;
import javax.swing.JFrame;



class SetScrollBar extends JFrame implements AdjustmentListener{
private JLabel labelRed, labelGreen, labelBlue;
private JScrollBar sBarRed, sBarGreen, sBarBlue;

public SetScrollBar(){
//setting layout
setLayout(new FlowLayout());

//initializing label for each scrollbar;
labelRed = new JLabel("Adjust Red:");
labelGreen = new JLabel("Adjust Green:");
labelBlue = new JLabel("Adjust Blue:");

//initializing scrollbar
sBarRed = new JScrollBar(JScrollBar.HORIZONTAL,0,5,0,255);
sBarGreen = new JScrollBar(JScrollBar.HORIZONTAL,0,5,0,255);
sBarBlue = new JScrollBar(JScrollBar.HORIZONTAL,0,5,0,255);

//adding eventlistener
sBarRed.addAdjustmentListener(this);
sBarGreen.addAdjustmentListener(this);
sBarBlue.addAdjustmentListener(this);

//adding label and scrollbar to the frame;
add(labelRed);
add(sBarRed);
add(labelGreen);
add(sBarGreen);
add(labelBlue);
add(sBarBlue);
}//end of constructor;

public void adjustmentValueChanged(AdjustmentEvent event){
int cRed, cGreen, cBlue; //store value of scrollbar
cRed = sBarRed.getValue(); //getting current value of scroll bar;
cGreen = sBarGreen.getValue();
cBlue = sBarBlue.getValue();

getContentPane().setBackground(new Color(cRed,cGreen,cBlue)); //change the background color;
}//end of event handler
} //end of SetScrollBar class

public class ScrollColor{
public static void main(String[] args){
SetScrollBar demo = new SetScrollBar();
demo.setSize(200,300);
demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
demo.setVisible(true);
}
} //end of main class