scrollbartest.java

来自「Java语言」· Java 代码 · 共 27 行

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class ScrollbarTest extends Applet implements AdjustmentListener
{
  Scrollbar mySlider;
  TextField sliderValue;
  public void init()
  {
    setLayout(new BorderLayout());
    mySlider = new Scrollbar(Scrollbar.HORIZONTAL,0,100,0,Integer.MAX_VALUE); 
    mySlider.setUnitIncrement(1);
    mySlider.setBlockIncrement(50);   
    add("South",mySlider);
    mySlider.addAdjustmentListener(this);
    sliderValue = new TextField(30);
    add("Center",sliderValue);
  }
  public void adjustmentValueChanged(AdjustmentEvent e)
  {
    int value;
    value = mySlider.getValue();
    sliderValue.setText(Integer.toString(value));
    sliderValue.setBackground(new Color(value));
  }
}