RunTime在Mac上执行

时间:2016-12-30 05:22:40

标签: java eclipse macos runtime

我一直在研究Java,我想制作一个应用程序来打开Mac上的终端等其他应用程序。

我多次失败让它开始工作,我现在有点困惑。

这是我的代码

package pac;



import java.awt.Desktop;

import java.io.File;

import java.io.IOException;

import javax.swing.*;

public class VnET extends JFrame {


    public VnET() {
    JFrame frame = new JFrame("Frame");

    //Optional: What happens when the frame closes?
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    // Create components and put them in the frame.
    frame.setTitle("VnET");

    // Size the frame.
    frame.setSize(500, 250);;

    // Show it.
    frame.setVisible(true);
    //centers window
    frame.setLocationRelativeTo(null);
    }

    public static void main(String args[]) {
        SwingUtilities.invokeLater(new Runnable(){
            public void run()   {
                new VnET();
            Runtime r = Runtime.getRuntime();
            Process p = null;
            try {
                p = r.exec("Terminal");
                p.waitFor();
            } catch (Exception e) {
                System.out.println("Error executing terminal");
            }
            System.out.println("Terminal returned"+ p.exitValue());
            }
        });
    }

}

这是控制台日志

  Error executing terminal
    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at pac.VnET$1.run(VnET.java:43)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
        at java.awt.EventQueue.access$500(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:709)
        at java.awt.EventQueue$3.run(EventQueue.java:703)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

1 个答案:

答案 0 :(得分:0)

这不是在Mac上打开终端的正确方法。

p = r.exec("Terminal");

在Mac上,如果您想通过命令行打开应用程序(顺便提一下终端!),您可以使用此命令:

open -a Safari

因此,在Java程序中,使用以下代码行:

p = r.exec("open -a Terminal");

open -a命令告诉Runtime打开名为“Terminal”的“App”。

有关open命令的更多信息,请参阅this page

希望这有帮助!