On 12/28/20 4:35 PM, Andreas Leitgeb wrote:
Knute Johnson <knute2020@585ranch.com> wrote:
Any way to tell on linux if a program is started from a terminal versus
started from clicking on an icon?
Maybe https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/java/awt/GraphicsEnvironment.html#isHeadless()
or
https://docs.oracle.com/javase/7/docs/api/java/lang/System.html#console() (compare result with null)
depending on what you want to get if both console and X11 is available.
The Console test worked perfectly, thanks Andreas! Here is my test
program if anybody is interested. Tested on Xubuntu 20.10 and
RaspberryPi OS.
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class test5 extends JFrame {
public test5() {
super("test5");
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
Console c = System.console();
JLabel l = new JLabel(c==null ? "null" :
c.toString(),JLabel.CENTER);
add(l,BorderLayout.CENTER);
setSize(400,300);
setLocationRelativeTo(null);
setVisible(true);
}
public static void main(String... args) {
EventQueue.invokeLater(() -> new test5());
}
}
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