Name: krC82822 Date: 02/05/2001


previous synopsis:
   "JSlider(min,max) ctor -> invalid range properties in DefaultBoundedRangeModel"

5 Feb 2001, eval1127@eng -- as noted in the 1.3 docs, the (default) initial
value is set to 50, independent of the min/max values specified. Thus,
the initial value could end up outside the specified range (min->max),
as in this case, where min=10, max=20.

Thus, we should consider setting the initial value to the midpoint between
mid and max. This is an ease-of-use issue. (It should be possible to
use this "simpler" constructor with ranges which do not include the
value 50. Otherwise, there's not much convenience associated
with this two-arg constructor.)

---------------
java version "1.2.2"
Classic VM (build JDK-1.2.2_005, native threads, symcjit)

through

java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b50)
Java HotSpot(TM) Client VM (build 1.4beta-B50, mixed mode)


/*
If you use this code, an exception was throws. The output is:
java.lang.IllegalArgumentException: invalid range properties
at javax.swing.DefaultBoundedRangeModel.<init>
(DefaultBoundedRangeModel.java:91)
at javax.swing.JSlider.<init>(JSlider.java:198)
at javax.swing.JSlider.<init>(JSlider.java:171)
at untitled1.Frame1.<init>(Frame1.java:18)
at untitled1.Frame1.main(Frame1.java:30)


If you set "max = 70", you have no problem.
The 2 arguments JSlider costructor is wrong. Look that code
*/

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Frame1 extends JFrame {
  int min = 10;
  int max = 20;
  JSlider jSlider1 = new JSlider(min,max);

  public Frame1() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  public static void main(String[] args) {
    Frame1 frame11 = new Frame1();
    frame11.setSize(200,200);
    frame11.setVisible(true);
  }

  private void jbInit() throws Exception {
    this.addWindowListener(new java.awt.event.WindowAdapter() {

      public void windowClosing(WindowEvent e) {
        this_windowClosing(e);
      }
    });
    this.getContentPane().add(jSlider1, BorderLayout.CENTER);
  }

  void this_windowClosing(WindowEvent e) {
    System.exit(0);
  }
}

----------------------

java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b50)
Java HotSpot(TM) Client VM (build 1.4beta-B50, mixed mode)

Exception in thread "main" java.lang.IllegalArgumentException: invalid range properties
        at javax.swing.DefaultBoundedRangeModel.<init>(DefaultBoundedRangeModel.java:86)
        at javax.swing.JSlider.<init>(JSlider.java:198)
        at javax.swing.JSlider.<init>(JSlider.java:171)
        at Frame116364.<init>(Frame116364.java:28)
        at Frame116364.main(Frame116364.java:40)


(Review ID: 116364)
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