Sending slash and backslash with Java

When using a Java robot, when sending a slash or backslash throws an exception.

For example:

public void slash() throws AWTException {
    Robot rob = new Robot();
    rob.keyPress(KeyEvent.VK_SLASH);
    rob.keyRelease(KeyEvent.VK_SLASH);
}

public void backSlash() throws AWTException {
    Robot rob = new Robot();
    rob.keyPress(KeyEvent.VK_BACK_SLASH);
    rob.keyRelease(KeyEvent.VK_BACK_SLASH);
}

Then, when I want to type those, I use:

public void type() {

    try {
        slash();
    } catch (AWTException e) { System.out.println("Exception when typing slash."); }

    try {
        backSlash();
    } catch (AWTException e) { System.out.println("Exception when typing back slash."); }


}

I get two error messages in my console. By the way, all other keystrokes I tried to send worked fine.

I get the follwowing stacktrace for slash:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Invalid key code
    at sun.awt.windows.WRobotPeer.keyPress(Native Method)
    at java.awt.Robot.keyPress(Unknown Source)
    at com.paschoalinoto.bruno.pastescript.Paste.slash(Paste.java:23)
    at com.paschoalinoto.bruno.pastescript.Paste.type(Paste.java:36)
    at com.paschoalinoto.bruno.pastescript.MainGUI$4.actionPerformed(MainGUI.java:113)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.