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  1. /**
  2.  * キー押しっぱなしなのにkeyReleasedが呼ばれる問題
  3.  *
  4.  * {} <- こうなってほしい
  5.  * {{{{{{{{{} <- ぐぐった所こうなるのが正常らしい
  6.  * {}{}{}{}{}{}{}{}{}{}{}{}{}{}{} <- なぜかこうなる
  7.  * */
  8.  
  9. import javax.swing.JFrame;
  10. import javax.swing.JPanel;
  11.  
  12. import java.awt.event.KeyEvent;
  13. import java.awt.event.KeyListener;
  14.  
  15. public class Main extends JFrame {
  16.     public Main() {
  17.         JPanel panel = new KLPanel();
  18.         getContentPane().add(panel);
  19.     }
  20.  
  21.     public static void main(String[] args) {
  22.         Main frame = new Main();
  23.         frame.setVisible(true);
  24.     }
  25. }
  26.  
  27. class KLPanel extends JPanel implements KeyListener {
  28.     public KLPanel() {
  29.         setFocusable(true);
  30.         addKeyListener(this);
  31.     }
  32.     public void keyPressed(KeyEvent e) {
  33. 		System.out.print("{" /*+e.getKeyCode()*/ );
  34.     }
  35.     public void keyReleased(KeyEvent e) {
  36. 		System.out.print( /*" "+e.getKeyCode()+*/ "}");
  37.     }
  38.     public void keyTyped(KeyEvent e) {}
  39. }
  40.  
Compilation error #stdin compilation error #stdout 0s 0KB
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Standard input is empty
compilation info 
prog.cpp:9: error: ‘import’ does not name a type
prog.cpp:10: error: ‘import’ does not name a type
prog.cpp:12: error: ‘import’ does not name a type
prog.cpp:13: error: ‘import’ does not name a type
prog.cpp:15: error: expected unqualified-id before ‘public’
stdout
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Standard output is empty
https://ideone.com/Tko4s
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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