如何阻止用户复制JTextField的内容?
我有以下但我无法想办法同时获得多个密钥?
myTextField.addKeyListener(new KeyAdapter() {
@Override
public void keyTyped(KeyEvent e) {
char c = e.getKeyChar();
if (!Character.isDigit(c)) {
e.consume();
}
}
});
答案 0 :(得分:2)
为此,您必须修改KeyAdapter,以便在按下按键和释放按键时可以注册,以便我们可以知道何时同时按下两个按键,以下代码应该可以解决问题: / p>
textfield.addKeyListener(new KeyAdapter() {
boolean ctrlPressed = false;
boolean cPressed = false;
@Override
public void keyPressed(KeyEvent e) {
switch(e.getKeyCode()) {
case KeyEvent.VK_C:
cPressed=true;
break;
case KeyEvent.VK_CONTROL:
ctrlPressed=true;
break;
}
if(ctrlPressed && cPressed) {
System.out.println("Blocked CTRl+C");
e.consume();// Stop the event from propagating.
}
}
@Override
public void keyReleased(KeyEvent e) {
switch(e.getKeyCode()) {
case KeyEvent.VK_C:
cPressed=false;
break;
case KeyEvent.VK_CONTROL:
ctrlPressed=false;
break;
}
if(ctrlPressed && cPressed) {
System.out.println("Blocked CTRl+C");
e.consume();// Stop the event from propagating.
}
}
});
我只是将其添加到我的一个JTextFields中。