![](https://csdnimg.cn/release/download_crawler_static/87326140/bg4.jpg)
337); int width =
Toolkit.getDefaultToolkit().getScreenSize().width; window
.setResizable(false); int height =
Toolkit.getDefaultToolkit().getScreenSize().height;
window.setLocation(width / 2 - 200, height / 2 - 150);
window .setLayout(null); /
final JTextField text = new JTextField();
//text.setEditable(false); text.setEditable(true);
text.setBounds(10,40,360,50); window .add(text);
text.setForeground(Color.blue);
text.setBackground(Color.LIGHTGRAY );
text.addActionListener(new ActionListener() { public void
actionPerformed(ActionEvent arg0) { ScriptEngineManager
sem1 = new ScriptEngineManager(); ScriptEngine se1 =
sem1.getEngineByName("js"); try{ int leng10 =
text.getText().length(); if(leng10 == 0) {
JOptionPane.showMessageDialog(null, "对不起,您没有任何
text.requestFocusInWindow();
text.setHorizontalAlignment(JTextField.RIGHT);
输入,请重新输入:");
}
else { } String reslut =
text.setText(text.getText()+"="+reslut);
text.requestFocus(); se1.eval(text.getText()).toString();
}catch (ScriptException evt){