Java ActionEvent SHIFT_MASK
Syntax
ActionEvent.SHIFT_MASK has the following syntax.
public static final int SHIFT_MASK
Example
In the following code shows how to use ActionEvent.SHIFT_MASK field.
/*from w w w .j a v a 2 s. c o m*/
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
System.out.println("Command: " + e.getActionCommand());
int modifiers = e.getModifiers();
System.out.println("\tALT : "
+ checkMod(modifiers, ActionEvent.ALT_MASK));
System.out.println("\tCTRL : "
+ checkMod(modifiers, ActionEvent.CTRL_MASK));
System.out.println("\tMETA : "
+ checkMod(modifiers, ActionEvent.META_MASK));
System.out.println("\tSHIFT: "
+ checkMod(modifiers, ActionEvent.SHIFT_MASK));
Object source = e.getSource();
if (source instanceof JButton) {
JButton jb = (JButton) source;
System.out.println("JButton: " + jb.getText());
}
}
private boolean checkMod(int modifiers, int mask) {
return ((modifiers & mask) == mask);
}
}
public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame();
JButton button = new JButton("Click and holding alt, control, and shift key");
button.addActionListener(new MyActionListener());
frame.add(button);
frame.pack();
frame.setVisible(true);
}
}
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