How do you add an ActionListener onto a JButton in Java

Question

private JButton jBtnDrawCircle   new JButton  Circle    private JButton jBtnDrawSquare   new JButton  Square    private JButton jBtnDrawTriangle   new JButton  Triangle    private JButton jBtnSelection   new JButton  Selection      How do I add action listeners to these buttons  so that from a main method I can call actionperformed on them  so when they are clicked I can call them in my program

User · Answer

I m didn t totally follow  but to add an action listener  you just call addActionListener  from Abstract Button    If this doesn t totally answer your question  can you provide some more details

User · Answer

I don t know if this works but I made the variable names  public abstract class beep implements ActionListener       public static void main String   args            JFrame f   new JFrame  beeper            JButton button   new JButton  Beep me            f setVisible true           f setSize 300  200           f add button           button addActionListener new ActionListener                 public void actionPerformed ActionEvent e                       Insert code here

User · Answer

I m didn t totally follow  but to add an action listener  you just call addActionListener  from Abstract Button    If this doesn t totally answer your question  can you provide some more details

User · Answer

Your best bet is to review the Java Swing tutorials  specifically the tutorial on Buttons   The short code snippet is   jBtnDrawCircle addActionListener    class that implements ActionListener

User · Answer

I m didn t totally follow  but to add an action listener  you just call addActionListener  from Abstract Button    If this doesn t totally answer your question  can you provide some more details

User · Answer

Two ways   1  Implement ActionListener in your class  then use jBtnSelection addActionListener this    Later  you ll have to define a menthod  public void actionPerformed ActionEvent e    However  doing this for multiple buttons can be confusing  because the actionPerformed method will have to check the source of each event  e getSource    to see which button it came from   2  Use anonymous inner classes    jBtnSelection addActionListener new ActionListener        public void actionPerformed ActionEvent e         selectionButtonPressed               Later  you ll have to define selectionButtonPressed    This works better when you have multiple buttons  because your calls to individual methods for handling the actions are right next to the definition of the button   The second method also allows you to call the selection method directly   In this case  you could call selectionButtonPressed   if some other action happens  too - like  when a timer goes off or something  but in this case  your method would be named something different  maybe selectionChanged

User · Answer

Your best bet is to review the Java Swing tutorials  specifically the tutorial on Buttons   The short code snippet is   jBtnDrawCircle addActionListener    class that implements ActionListener

User · Answer

I m didn t totally follow  but to add an action listener  you just call addActionListener  from Abstract Button    If this doesn t totally answer your question  can you provide some more details

User · Answer

Two ways   1  Implement ActionListener in your class  then use jBtnSelection addActionListener this    Later  you ll have to define a menthod  public void actionPerformed ActionEvent e    However  doing this for multiple buttons can be confusing  because the actionPerformed method will have to check the source of each event  e getSource    to see which button it came from   2  Use anonymous inner classes    jBtnSelection addActionListener new ActionListener        public void actionPerformed ActionEvent e         selectionButtonPressed               Later  you ll have to define selectionButtonPressed    This works better when you have multiple buttons  because your calls to individual methods for handling the actions are right next to the definition of the button   The second method also allows you to call the selection method directly   In this case  you could call selectionButtonPressed   if some other action happens  too - like  when a timer goes off or something  but in this case  your method would be named something different  maybe selectionChanged

User · Answer

I don t know if this works but I made the variable names  public abstract class beep implements ActionListener       public static void main String   args            JFrame f   new JFrame  beeper            JButton button   new JButton  Beep me            f setVisible true           f setSize 300  200           f add button           button addActionListener new ActionListener                 public void actionPerformed ActionEvent e                       Insert code here

User · Answer

Your best bet is to review the Java Swing tutorials  specifically the tutorial on Buttons   The short code snippet is   jBtnDrawCircle addActionListener    class that implements ActionListener

User · Answer

Two ways   1  Implement ActionListener in your class  then use jBtnSelection addActionListener this    Later  you ll have to define a menthod  public void actionPerformed ActionEvent e    However  doing this for multiple buttons can be confusing  because the actionPerformed method will have to check the source of each event  e getSource    to see which button it came from   2  Use anonymous inner classes    jBtnSelection addActionListener new ActionListener        public void actionPerformed ActionEvent e         selectionButtonPressed               Later  you ll have to define selectionButtonPressed    This works better when you have multiple buttons  because your calls to individual methods for handling the actions are right next to the definition of the button   The second method also allows you to call the selection method directly   In this case  you could call selectionButtonPressed   if some other action happens  too - like  when a timer goes off or something  but in this case  your method would be named something different  maybe selectionChanged

User · Answer

Your best bet is to review the Java Swing tutorials  specifically the tutorial on Buttons   The short code snippet is   jBtnDrawCircle addActionListener    class that implements ActionListener

User · Answer

Two ways   1  Implement ActionListener in your class  then use jBtnSelection addActionListener this    Later  you ll have to define a menthod  public void actionPerformed ActionEvent e    However  doing this for multiple buttons can be confusing  because the actionPerformed method will have to check the source of each event  e getSource    to see which button it came from   2  Use anonymous inner classes    jBtnSelection addActionListener new ActionListener        public void actionPerformed ActionEvent e         selectionButtonPressed               Later  you ll have to define selectionButtonPressed    This works better when you have multiple buttons  because your calls to individual methods for handling the actions are right next to the definition of the button   The second method also allows you to call the selection method directly   In this case  you could call selectionButtonPressed   if some other action happens  too - like  when a timer goes off or something  but in this case  your method would be named something different  maybe selectionChanged

[java] How do you add an ActionListener onto a JButton in Java

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