java.awt.HeadlessException [英] java.awt.HeadlessException

问题描述

JFileChooser chooser = new JFileChooser();
JDialog dialog=new JDialog();
dialog.setAlwaysOnTop(true);
/*System.out.println("is always on top?"+dialog.isAlwaysOnTop());*/
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnVal = chooser.showOpenDialog(dialog);

String path = null;

if(returnVal == JFileChooser.APPROVE_OPTION) {

    path=chooser.getSelectedFile().getAbsolutePath();

}

当我在linux服务器中部署以下异常时，我已经用Servlet的 doGet 方法编写了此代码.

I have written this code in Servlet's doGet method.when i deployed in linux server getting following exception:

java.awt.HeadlessException
    at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)

有人知道该如何克服吗?

Does anyone know how to over come this?

推荐答案

HeadlessException

在不支持键盘，显示器或鼠标的环境中调用依赖于键盘，显示器或鼠标的代码时引发.

Thrown when code that is dependent on a keyboard, display, or mouse is called in an environment that does not support a keyboard, display, or mouse.

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