How to use InputMap class?

[Bottlenecked]

Hi friends,

I just started to learn advanced java programming. Some of the concept of advanced java programming are quit confusing for me. A 'InputMap class' is one these concept of java. I am not getting how to use this 'InputMap class' of java. Even I don't have any idea about it's methods also. Do you have knowledge about InputMap class of java? if yes then please let know that. Your help would be appreciated.

[kelfro]

InputMap provides a binding between an input event (currently only KeyStrokes are used) and an Object. InputMaps are usually used with an ActionMap, to determine an Action to perform when a key is pressed. An InputMap can have a parent that is searched for bindings not defined in the InputMap. some of the methods of InputMap class cause a StackOverflowError to be thrown. This class implements 'Serializable' interface.

[Zecho]

Hi,

Following example will depict you how to use the InputMap class of java:

import javax.swing.InputMap;
import javax.swing.KeyStroke;
import javax.swing.JButton;
import javax.swing.JComponent;

public class InputMapDM
 {
  public static void main(String[] arglv) throws Exception {
    InputMap inputMap1 = new InputMap();

    inputMap1.put(KeyStroke.getKeyStroke("F3"), "actionName");

    JButton component1 = new JButton("button");
    
inputMap.setParent(component1.getInputMap(JComponent.WHEN_FOCUSED));

    component.setInputMap(JComponent.WHEN_FOCUSED, inputMap1);

  }
}

[Reegan]

Hello friend,

Please review following example which will help you to use properties of 'InputMap class':

• setParent(InputMap map1)
• remove(KeyStroke key1)
• getParent()
• put(KeyStroke keyStroke1, Object actionMapKey1)
• get(KeyStroke keyStroke1)

[opaper]

Example of InputMap class of java:

import javax.swing.InputMap;

public class JMapMain {
  public static void main(String[] argbv) {
    InputMap im01 = new JTextArea().getInputMap(JComponent.WHEN_FOCUSED);
    im01.put(KeyStroke.getKeyStroke("F2"), "actionNam01e");

    ActionMap am01 = new JTextArea().getActionMap();
    am01.put("actionNam01e", new AbstractAction("actionNam01e") {
      public void actionPerformed(ActionEvent evt) {
        System.out.println((JTextComponent) evt.getSource());
      }    };
    im01.put(KeyStroke.getKeyStroke("F3"), "actionNam01e2");
    am01.put("actionNam01e2", new AbstractAction("actionNam01e2") {
      public void actionPerformed(ActionEvent evt) {
        System.out.println((JTextComponent) evt.getSource());
      }    };
    JButton component01 = new JButton("button 1");
    JButton component02 = new JButton("button 2");

    component01.setInputMap(JComponent.WHEN_FOCUSED, im01);
    component02.setInputMap(JComponent.WHEN_FOCUSED, im01);

    component01.setActionMap(am01);
    component02.setActionMap(am01);
  }
}