Посмотрел в соседней теме, вот что пишет при запуске с командной строки
>java -jar UTM_Admin.jar
java.lang.NullPointerException
at com.sun.java.swing.plaf.windows.XPStyle.getString(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.getString(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.getBoolean(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.access$100(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle$Skin.<init>(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle$Skin.<init>(Unknown Source)
at com.sun.java.swing.plaf.windows.XPStyle.getSkin(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsTreeUI$ExpandedIcon.<init>(Unk
nown Source)
at com.sun.java.swing.plaf.windows.WindowsTreeUI$ExpandedIcon.createExpa
ndedIcon(Unknown Source)
at com.sun.java.swing.plaf.windows.WindowsLookAndFeel.initComponentDefau
lts(Unknown Source)
at javax.swing.plaf.basic.BasicLookAndFeel.getDefaults(Unknown Source)
at javax.swing.UIManager.setLookAndFeel(Unknown Source)
at javax.swing.UIManager.setLookAndFeel(Unknown Source)
at com.netup.utmadmin.UTM_Admin.main(UTM_Admin.java:39)
Exception in thread "main" java.lang.NullPointerException
at javax.swing.MultiUIDefaults.getUIError(Unknown Source)
at javax.swing.UIDefaults.getUI(Unknown Source)
at javax.swing.UIManager.getUI(Unknown Source)
at javax.swing.JPanel.updateUI(Unknown Source)
at javax.swing.JPanel.<init>(Unknown Source)
at javax.swing.JPanel.<init>(Unknown Source)
at javax.swing.JPanel.<init>(Unknown Source)
at javax.swing.JRootPane.createGlassPane(Unknown Source)
at javax.swing.JRootPane.<init>(Unknown Source)
at javax.swing.JFrame.createRootPane(Unknown Source)
at javax.swing.JFrame.frameInit(Unknown Source)
at javax.swing.JFrame.<init>(Unknown Source)
at com.netup.utmadmin.misc.Dialog_Login.<init>(Dialog_Login.java:67)
at com.netup.utmadmin.UTM_Admin.<init>(UTM_Admin.java:18)
at com.netup.utmadmin.UTM_Admin.main(UTM_Admin.java:76)