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  1. import javax.swing.*;
  2. class Main
  3. {
  4. public static void main(String[] args)
  5. {
  6. JFrame f=new JFrame("test");
  7. JButton b=new JButton("Button");
  8.  f.add(b);
  9. f.setSize(100,100);
  10. f.setVisible(true);
  11.  }
  12. }
Runtime error #stdin #stdout #stderr 0.09s 381184KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.awt.HeadlessException: 
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
	at java.awt.Window.<init>(Window.java:535)
	at java.awt.Frame.<init>(Frame.java:420)
	at javax.swing.JFrame.<init>(JFrame.java:224)
	at Main.main(Main.java:6)
https://ideone.com/9kYbCi
language:
Java (12.0.1)
created:
10 years ago
visibility:
public

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