Can't start yed.jar

Question

Hi, pease help

I have Java 8 installed on fc27 (java-1.8.0-oracle - Oracle Java Runtime Environment)

the promt output of commando

[~/yed-3.17.2]$ java -jar yed.jar

is below

Exception in thread "main" java.awt.HeadlessException
    at sun.java2d.HeadlessGraphicsEnvironment.getDefaultScreenDevice(HeadlessGraphicsEnvironment.java:77)
    at com.yworks.A.P.R.<init>(Unknown Source)
    at com.yworks.A.D.ć(Unknown Source)
    at com.yworks.A.D.Ă(Unknown Source)
    at com.yworks.A.D.ā(Unknown Source)
    at com.yworks.A.yEd.ā(Unknown Source)
    at com.yworks.A.yEd.main(Unknown Source)
 

the concole freezes and yED don't want start

Answer 1

yEd requires a display to run. The above error message means that Java is not able to access a display. Do you have a window manager / X server installed?