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Error java.lang.OutOfMemoryError: GC overhead limit exceeded
...ast 5 (compile time constant) consecutive garbage collections, then a java.lang.OutOfMemoryError is thrown. [...]
Increase the heap size if current heap is not enough.
If you still get this error after increasing heap memory, use memory profiling tools like MAT ( Memory analyzer tool), Visual VM...
Detecting Windows or Linux? [duplicate]
...
apache commons lang has a class SystemUtils.java
you can use :
SystemUtils.IS_OS_LINUX
SystemUtils.IS_OS_WINDOWS
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micro:bit 连接报错 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...连上的一瞬间后直接闪退，并且报错了。
运行故障
java.lang.ExceptionInInitializerError at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.subscribeBluetoothLEint.java:357) at
edu.mit.appinventor.ble.BluetoothLEintSBLEReadOperation.run(BluetoothLEint.java:325) at android....
IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
...
Somehow the JDK language jars were removed from the classpath. All I had to do was reapply the JSDK home path.
Goto:
File -> Project Structure -> Platform Settings -> SDKs
Re-apply the JSDK home path.
Doing this added about 15 j...
What does java.lang.Thread.interrupt() do?
Could you explain what java.lang.Thread.interrupt() does when invoked?
9 Answers
9
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How can a Java program get its own process ID?
...s but should work on both linux and windows (original example here):
java.lang.management.RuntimeMXBean runtime =
java.lang.management.ManagementFactory.getRuntimeMXBean();
java.lang.reflect.Field jvm = runtime.getClass().getDeclaredField("jvm");
jvm.setAccessible(true);
sun.management.VMManag...
How to convert / cast long to String?
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Before Java 7, you could also use Commons Lang's ObjectUtils.toString(Object,String) which is equivalent. -> commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/…, java.lang.String)
– Guillaume Husta
Jul 23 '14 at 9...
java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
i am using spring 3.1.0.RELEASE , and my servlet container is tomcat 7 and my IDE is eclipse indigo
and the jar spring-webmvc-3.1.0.RELEASE.jar which contains the DispatcherServlet
exists in the lib folder, and yet when running the application, i am getting the exception:
...
Add primary key to existing table
...e is how to do it correctly:
In this example, the table name is dbo.T_SYS_Language_Forms, and the column name is LANG_UID
-- First, chech if the table exists...
IF 0 < (
SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
AND TABLE_SCHEMA = 'dbo'
AND ...
JavaScript for detecting browser language preference [duplicate]
I have been trying to detect the browser language preference using JavaScript.
26 Answers
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