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    <blockquote> <p>it is because you have just assigned the action listener to your button with this and on method you'r again assigining the action listener which is the instance of tCalculator class so when you press the button boath action listener called and 2 results are shown to you, just remove the btn1ActionPerformed method and it will work fine. try below code now................................</p> </blockquote> <pre><code>import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JTextField; public class Tcalculator extends JFrame implements ActionListener{ private JButton btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9,btnZero; private JTextField txtArea; public Tcalculator(){ btn1 = new JButton("1"); btn2 = new JButton("2"); btn3 = new JButton("3"); btn4 = new JButton("4"); btn5 = new JButton("5"); btn6 = new JButton("6"); btn7 = new JButton("7"); btn8 = new JButton("8"); btn9 = new JButton("9"); btnZero = new JButton("0"); txtArea = new JTextField(15); init(); } //performed all gui operations public void init(){ getContentPane().setLayout(new FlowLayout()); setSize(200, 200); add(txtArea); add(btn1);add(btn2); add(btn3);add(btn4); add(btn5);add(btn6); add(btn7);add(btn8); add(btn9);add(btnZero); btn1.addActionListener(this); btn2.addActionListener(this); btn3.addActionListener(this); btn4.addActionListener(this); btn5.addActionListener(this); btn6.addActionListener(this); btn7.addActionListener(this); btn8.addActionListener(this); btn9.addActionListener(this); btnZero.addActionListener(this); setDefaultCloseOperation(EXIT_ON_CLOSE); setVisible(true); } // i am using this your made function nothing changed public void actionPerformed(ActionEvent evt) { String x = txtArea.getText(); String k = evt.getActionCommand(); String a = x + k ; txtArea.setText(a); } public static void main(String args[]){ new Tcalculator(); } } </code></pre>
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    1. POProblem implementing ActionListener to a group of jButtons
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    1. COwhen i remove btn1ActionPerformed and click any button, nothing happens, no value is printed in the jTextField. Looks like i have to associate actionPerformed to my buttons in some way and am missing that part.
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    2. COplease check the code i have made this for you to understand well
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    3. CO+1 for the complete workable Code.
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      1. USTalha Ahmed Khan
 

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