153 "\nNo X11 DISPLAY variable was set, " +
154 "but this program performed an operation which requires it.";
155 }
156
157 /**
158 * @return the value of the property "java.awt.headless"
159 * @since 1.4
160 */
161 private static boolean getHeadlessProperty() {
162 if (headless == null) {
163 java.security.AccessController.doPrivileged(
164 new java.security.PrivilegedAction() {
165 public Object run() {
166 String nm = System.getProperty("java.awt.headless");
167
168 if (nm == null) {
169 /* No need to ask for DISPLAY when run in a browser */
170 if (System.getProperty("javaplugin.version") != null) {
171 headless = defaultHeadless = Boolean.FALSE;
172 } else {
173 String osName = System.getProperty("os.name");
174 headless = defaultHeadless =
175 Boolean.valueOf(("Linux".equals(osName) ||
176 "SunOS".equals(osName) ||
177 "FreeBSD".equals(osName) ||
178 "NetBSD".equals(osName) ||
179 "OpenBSD".equals(osName)) &&
180 (System.getenv("DISPLAY") == null));
181 }
182 } else if (nm.equals("true")) {
183 headless = Boolean.TRUE;
184 } else {
185 headless = Boolean.FALSE;
186 }
187 return null;
188 }
189 }
190 );
191 }
192 return headless.booleanValue();
193 }
194
195 /**
196 * Check for headless state and throw HeadlessException if headless
197 * @since 1.4
198 */
199 static void checkHeadless() throws HeadlessException {
200 if (isHeadless()) {
|
153 "\nNo X11 DISPLAY variable was set, " +
154 "but this program performed an operation which requires it.";
155 }
156
157 /**
158 * @return the value of the property "java.awt.headless"
159 * @since 1.4
160 */
161 private static boolean getHeadlessProperty() {
162 if (headless == null) {
163 java.security.AccessController.doPrivileged(
164 new java.security.PrivilegedAction() {
165 public Object run() {
166 String nm = System.getProperty("java.awt.headless");
167
168 if (nm == null) {
169 /* No need to ask for DISPLAY when run in a browser */
170 if (System.getProperty("javaplugin.version") != null) {
171 headless = defaultHeadless = Boolean.FALSE;
172 } else {
173 if ("sun.awt.HeadlessGraphicsEnvironment".equals(
174 System.getProperty("java.awt.graphicsenv")))
175 {
176 headless = defaultHeadless = Boolean.TRUE;
177 } else {
178 String osName = System.getProperty("os.name");
179 headless = defaultHeadless =
180 Boolean.valueOf(("Linux".equals(osName) ||
181 "SunOS".equals(osName) ||
182 "FreeBSD".equals(osName) ||
183 "NetBSD".equals(osName) ||
184 "OpenBSD".equals(osName)) &&
185 (System.getenv("DISPLAY") == null));
186 }
187 }
188 } else if (nm.equals("true")) {
189 headless = Boolean.TRUE;
190 } else {
191 headless = Boolean.FALSE;
192 }
193 return null;
194 }
195 }
196 );
197 }
198 return headless.booleanValue();
199 }
200
201 /**
202 * Check for headless state and throw HeadlessException if headless
203 * @since 1.4
204 */
205 static void checkHeadless() throws HeadlessException {
206 if (isHeadless()) {
|