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  1. JDK
  2. JDK-4915973

Applet's TextField refuses input when returning to it from another page

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • Icon: P4 P4
    • None
    • 1.4.2_01
    • deploy
    • sparc
    • solaris_8



      Name: gm110360 Date: 09/02/2003


      FULL PRODUCT VERSION :
      java version "1.4.2"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-b28)
      Java HotSpot(TM) Client VM (build 1.4.2-b28, mixed mode)


      FULL OS VERSION :
      SunOS image3 5.8 Generic_108528-19 sun4u sparc SUNW,Ultra-60

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      Behaviour observed in Netscape browser 7.0

      A DESCRIPTION OF THE PROBLEM :
      When accessing the following applet's textfield:

      public class textf extends Applet {
        TextField tf = new TextField("Applet",8);

              public void init() {
            add(tf);
            add(tf1);
            add(tf2);
            tf.addActionListener(
              new ActionListener() {
                public void actionPerformed(ActionEvent e){
                  System.out.println("field is: " + e.getActionCommand());
                }
              }
            );
              }
      }

      from the foll. html file:
      <applet archive=tf.jar code=textf.class height=100 width=200></applet>

      the TextField has the focus when the applet is accessed for the first time.
      However, if one goes to a different page and returns to the applet, the
      TextField no longer allows user input.



      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      - Compile the applet under jre 1.4.2; run it in NS 7.0 on a Sun Solaris 8
        where NS uses the jre 1.4.2 Hotspot virtual machine.
        You should see the error

      - Access the same applet compilation from a PC using Windows 2000, through
        MSIE 6.0 or NS 7.1, using jre 1.4.0_01 and it should work ok.

      - Compile the applet under jre 1.1.18_10; run it in NS 4.75 on a Sun Solaris 8
        where NS uses the jre 1.1.5, and the applet should work consistently.


      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      - Compile the applet under jre 1.4.2; run it in NS 7.0 on a Sun Solaris 8
        where NS uses the jre 1.4.2 Hotspot virtual machine.
        The TextField should allow input when it is visible.

      - Access the same applet compilation from a PC using Windows 2000, through
        MSIE 6.0 or NS 7.1, using jre 1.4.0_01 and it should work ok.

      - Compile the applet under jre 1.1.18_10; run it in NS 4.75 on a Sun Solaris 8
        where NS uses the jre 1.1.5, and the applet should work consistently.

      ACTUAL -
      - Compile the applet under jre 1.4.2; run it in NS 7.0 on a Sun Solaris 8
        where NS uses the jre 1.4.2 Hotspot virtual machine.
        You should see the error

      - Access the same applet compilation from a PC using Windows 2000, through
        MSIE 6.0 or NS 7.1, using jre 1.4.0_01 and it should work ok.

      - Compile the applet under jre 1.1.18_10; run it in NS 4.75 on a Sun Solaris 8
        where NS uses the jre 1.1.5, and the applet should work consistently.


      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      No error messages.

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      import java.applet.*;
      import java.awt.*;
      import java.awt.event.*;

      public class textf extends Applet {
        TextField tf = new TextField("Applet",8);

              public void init() {
            add(tf);
            add(tf1);
            add(tf2);
            tf.addActionListener(
              new ActionListener() {
                public void actionPerformed(ActionEvent e){
                  System.out.println("field is: " + e.getActionCommand());
                }
              }
            );
              }
      }


      Source code of the html file to invoke the applet:
      <applet archive=tf.jar code=textf.class height=100 width=200></applet>

      ---------- END SOURCE ----------
      (Incident Review ID: 194019)
      ======================================================================

            zgu Zhengyu Gu
            gmanwanisunw Girish Manwani (Inactive)
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              Created:
              Updated:
              Resolved:
              Imported:
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