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();
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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 if (osName.contains("OS X") && "sun.awt.HToolkit".equals(
175 System.getProperty("awt.toolkit")))
176 {
177 headless = defaultHeadless = Boolean.TRUE;
178 } else {
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();
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