小编jes*_*chk的帖子

我试图在Java Swing(Netbeans)中更改JPasswordField的背景颜色.

这就是我所拥有的:

private void pstxtPasswordKeyPressed(java.awt.event.KeyEvent evt) {                                         

    //Get string from password box
    userPassword = new String(pstxtPassword.getPassword());

    //If password is 8+ characters
    //(one less because string counting begins at 0)
    if (userPassword.length() >= 7) {

        //Set password input box background color to green
        pstxtPassword.setBackground(Color.green);
    }

    else { //If password is less than 8 characters

        //Set password input box background color to red
        pstxtPassword.setBackground(Color.red);
    }

}

一切正常,除非我退格.键入8个以上字符后退格时,颜色不会变回红色,直到字段中只剩下5个字符.

帮助将不胜感激,我是java编程和Netbeans的新手.

编辑:我改变了我的代码,

    //If password is 8+ characters
    if ((pstxtPassword.getPassword()).length >= 8) {

        //Set password …