小编akk*_*996的帖子

或者显示文本框中键入的任何文本

//     in either Capital or lowercase depending on the original
//     letter changed.  For example:  CoMpUtEr will convert to
//     cOmPuTeR and vice versa.
    Switch.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e )

            String characters = (SecondTextField.getText()); //String to read the user input
            int length = characters.length();  //change the string characters to length

         for(int i = 0; i < length; i++)  //to check the characters of string..
         {             
            char character = characters.charAt(i);          

            if(Character.isUpperCase(character)) 
            {
                SecondTextField.setText("" + characters.toLowerCase());

            }
            else  if(Character.isLowerCase(character)) …

这是我的文本字段代码.当线条结束时它不会改变线条,但是继续继续,使框架看起来很奇怪.

我试图使用滚动窗格,但它没有帮助我.

JTextArea TextArea = new JTextArea(7,10);
gridConstraints.gridx = 0;
gridConstraints.gridy = 0;
TextPanel.add(TextArea, gridConstraints);
TextArea.setEditable(true);