public static void sendScenarioToEdc(String connectionType, String ipOrBaudrate, String portOrCom, String timeout, String profile) {
loadEcrLib();
File file = new File (ApplicationConstans.PROFILE_FOLDER +profile+ ".csv");
// create parameter for the dll
String param = createParameter(connectionType, ipOrBaudrate, portOrCom, timeout);
List<Transaction> transactions = new ArrayList<Transaction>();
String[] messages = CsvUtil.readRequestMessage(file);
for (String message : messages) {
Transaction t = new Transaction();
t.setRequestMsg(message);
EcrInterface ecrLib = EcrInterface.INSTANCE;
Pointer stringMem = new Memory(3000);
stringMem.setString(0, " ");
Pointer response = stringMem.getPointer(0);
// notify the user before hand
System.out.println("Request: "+ t.getRequestMsg());
long time = System.currentTimeMillis();
Integer status = ecrLib.procEdcTrans(message, response, param); //send message here
t.setResponseStatus(status.toString());
t.setResponseTime(System.currentTimeMillis() - time);
t.setResponseMsg(response.getString(0).replace("ÿ", "")); // trim 0x255 characters
System.out.println("Response: "+ t.getResponseMsg());
System.out.println("Time: "+ (t.getResponseTime() / 1000) + "." + (t.getResponseTime() % 1000) + " s");
System.out.println("Status: "+ t.getResponseStatus());
返回错误java.lang.OutOfMemoryError：无法分配3000字节
为什么程序不能分配如此小的内存？ 我还使用了这个参数“java -Xmx2048m -Xms512m”来配置内存堆，但这并没有解决问题。
这是跟踪：
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Cannot allocate 3000 bytes
at com.sun.jna.Memory.<init>(Memory.java:70)
at com.kartuku.utils.SenderUtil.sendScenarioToEdc(SenderUtil.java:98)
at com.kartuku.ui.Main1.btnRunMouseClicked(Main1.java:581)
at com.kartuku.ui.Main1.access$000(Main1.java:31)
at com.kartuku.ui.Main1$1.mouseClicked(Main1.java:123)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
at java.awt.Component.processMouseEvent(Component.java:6536)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4534)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
答案 0 :(得分：0)
此错误通常表示您的计算机内存不足。尝试让任务管理器同时打开并查看你的ram使用情况，如果它达到3mb以内，那就是问题。如果没有，那么Java很可能没有足够的空间进行操作。