1079         return clipboard;
1080     }
1081 
1082     public Clipboard getSystemSelection() {
1083         SecurityManager security = System.getSecurityManager();
1084         if (security != null) {
1085             security.checkSystemClipboardAccess();
1086         }
1087         synchronized (this) {
1088             if (selection == null) {
1089                 selection = new XClipboard("Selection", "PRIMARY");
1090             }
1091         }
1092         return selection;
1093     }
1094 
1095     public void beep() {
1096         awtLock();
1097         try {
1098             XlibWrapper.XBell(getDisplay(), 0);

1099         } finally {
1100             awtUnlock();
1101         }
1102     }
1103 
1104     static String getSystemProperty(final String name) {
1105         return (String)AccessController.doPrivileged(new PrivilegedAction() {
1106                 public Object run() {
1107                     return System.getProperty(name);
1108                 }
1109             });
1110     }
1111 
1112     public PrintJob getPrintJob(final Frame frame, final String doctitle,
1113                                 final Properties props) {
1114 
1115         if (GraphicsEnvironment.isHeadless()) {
1116             throw new IllegalArgumentException();
1117         }
1118 

1079         return clipboard;
1080     }
1081 
1082     public Clipboard getSystemSelection() {
1083         SecurityManager security = System.getSecurityManager();
1084         if (security != null) {
1085             security.checkSystemClipboardAccess();
1086         }
1087         synchronized (this) {
1088             if (selection == null) {
1089                 selection = new XClipboard("Selection", "PRIMARY");
1090             }
1091         }
1092         return selection;
1093     }
1094 
1095     public void beep() {
1096         awtLock();
1097         try {
1098             XlibWrapper.XBell(getDisplay(), 0);
1099             XlibWrapper.XFlush(getDisplay());
1100         } finally {
1101             awtUnlock();
1102         }
1103     }
1104 
1105     static String getSystemProperty(final String name) {
1106         return (String)AccessController.doPrivileged(new PrivilegedAction() {
1107                 public Object run() {
1108                     return System.getProperty(name);
1109                 }
1110             });
1111     }
1112 
1113     public PrintJob getPrintJob(final Frame frame, final String doctitle,
1114                                 final Properties props) {
1115 
1116         if (GraphicsEnvironment.isHeadless()) {
1117             throw new IllegalArgumentException();
1118         }
1119