bounded.java

来自「java swing 开发代码」· Java 代码 · 共 51 行

// Bounded.java
// A demonstration of the ChangeEvents generated by the BoundedRangeModel.
//
package	jswing.ch06;

import javax.swing.*;
import javax.swing.event.*;

public class Bounded {
    public Bounded() {
      try {
          DefaultBoundedRangeModel model = new DefaultBoundedRangeModel();
          ChangeListener myListener = new MyChangeListener();
          model.addChangeListener(myListener);

          System.out.println(model.toString()); 
          System.out.println("Now setting minimum to 50 . . ."); 
          model.setMinimum(50);
          System.out.println(model.toString()); 
          System.out.println("Now setting maximum to 40 . . ."); 
          model.setMaximum(40);
          System.out.println(model.toString()); 
          System.out.println("Now setting maximum to 50 . . ."); 
          model.setMaximum(50);
          System.out.println(model.toString()); 
          System.out.println("Now setting extent to 30 . . ."); 
          model.setExtent(30);
          System.out.println(model.toString()); 

          System.out.println("Now setting several properties . . ."); 
          if (!model.getValueIsAdjusting()) {
              model.setValueIsAdjusting(true);
              System.out.println(model.toString()); 
              model.setMinimum(0);
              model.setMaximum(100);
              model.setExtent(20);
              model.setValueIsAdjusting(false);
          }
          System.out.println(model.toString()); 
      } catch (Exception e) { e.printStackTrace(); }
    }

    class MyChangeListener implements ChangeListener {
        public void stateChanged(ChangeEvent e) {
            System.out.println("A ChangeEvent has been fired!");
        }
    }

    public static void main(String args[]) { new Bounded(); }
}