Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8166693

textfield.setText("") doesn't work

    XMLWordPrintable

    Details

    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      windows_7

      Description

      FULL PRODUCT VERSION :
      java version "1.8.0_101"
      java <TM> SE Runtime Environment (build 1.8.0_101-b13)
      Java Hotspot(TM) 64-bit Server VM (build 25.101-b13, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows 7 Professional (64-bit)

      [Version 6.1.7601]

      A DESCRIPTION OF THE PROBLEM :
      Button btnReset;

      btnReset.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
      txtName.setText("");
      txtRollNo.setText("");
      txtMarks.setText("");
      }
      });

      In the above code setText("") method doesn't change the value of the Textfiled string to empty string.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      In the following program pressing the Reset button doesn't reset the Strings in textboxes.

      import java.awt.*;
      import java.awt.event.*;
      import java.io.*;
            
      class Ideone extends Frame
      {
      Label lblName, lblRollNo, lblMarks;
      TextField txtName, txtRollNo, txtMarks;
      Button btnReset, btnSave;

      Ideone()
      {
      setLayout(new GridLayout(4, 2));
      setTitle("Student Record Maintainer");
      setSize(280,300);
      setVisible(true);

      lblName = new Label("Name: ");
      txtName = new TextField("", 20);

      lblRollNo = new Label("Roll No.: ");
      txtRollNo = new TextField("", 20);

      lblMarks = new Label("Marks: ");
      txtMarks = new TextField("", 20);

      btnReset = new Button("Reset");
      btnSave = new Button("Save");

      btnReset.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
      txtName.setText("");
      txtRollNo.setText("");
      txtMarks.setText("");
      }
      });

      btnSave.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
      System.out.println(txtName.getText());
      System.out.println(txtRollNo.getText());
      System.out.println(txtMarks.getText());
      }
      });

      addWindowListener( new WindowAdapter() {
      public void windowClosing(WindowEvent we) {
      System.exit(0);
      }
      }
      );

      add(lblName); add(txtName);
      add(lblRollNo); add(txtRollNo);
      add(lblMarks); add(txtMarks);
      add(btnReset); add(btnSave);
          }
            
          public static void main(String args[]) throws java.lang.Exception
      {
      new Ideone();
          }
      }


      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Upon pressing the Reset button the textfields (i.e. Roll No, Name, Marks)
      should be reset.
      ACTUAL -
      Upon pressing the Reset button the textfields (i.e. Roll No, Name, Marks)
      values are not reset. Nothing happens to textfield values.

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      // 1) Example of event handling within class

      import java.awt.*;
      import java.awt.event.*;
      import java.io.*;
            
      class Ideone extends Frame
      {
      Label lblName, lblRollNo, lblMarks;
      TextField txtName, txtRollNo, txtMarks;
      Button btnReset, btnSave;

      Ideone()
      {
      setLayout(new GridLayout(4, 2));
      setTitle("Student Record Maintainer");
      setSize(280,300);
      setVisible(true);

      lblName = new Label("Name: ");
      txtName = new TextField("", 20);

      lblRollNo = new Label("Roll No.: ");
      txtRollNo = new TextField("", 20);

      lblMarks = new Label("Marks: ");
      txtMarks = new TextField("", 20);

      btnReset = new Button("Reset");
      btnSave = new Button("Save");

      btnReset.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
      txtName.setText("");
      txtRollNo.setText("");
      txtMarks.setText("");
      }
      });

      btnSave.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
      System.out.println(txtName.getText());
      System.out.println(txtRollNo.getText());
      System.out.println(txtMarks.getText());
      }
      });

      addWindowListener( new WindowAdapter() {
      public void windowClosing(WindowEvent we) {
      System.exit(0);
      }
      }
      );

      add(lblName); add(txtName);
      add(lblRollNo); add(txtRollNo);
      add(lblMarks); add(txtMarks);
      add(btnReset); add(btnSave);
          }
            
          public static void main(String args[]) throws java.lang.Exception
      {
      new Ideone();
          }
      }

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      1) before setting the text by setText() method If we call setText() method with non-empty string it works.

      2) Before setting the text by setText() method If we call getText() method and then call setText method it also works.





        Attachments

          Issue Links

            Activity

              People

              Assignee:
              Unassigned Unassigned
              Reporter:
              webbuggrp Webbug Group
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

                Dates

                Created:
                Updated: