at com.jiuqi.dna.core.internal.db.datasource.PooledConnection.prepareStatement 通过synchronized关键字,成功获取到了对象的锁,成为监视器的拥有者,在临界区内操作。对象锁是可以线程重入的。 waiting to lock at com.jiuqi.dna.core.impl.CacheHolder.isVisibleIn(CacheHolder.java:165) - waiting to lock <0x...
If the block of code to be executed is just a single statement, you do not need the brackets { } around them, in the if statements. Here is an example: if ( isValid ) System.out.println("it is valid"); else System.out.println("it is not valid"); However, it is good pract...
sheet().doRead(); } 写Excel demo代码地址:https://github.com/alibaba/easyexcel/blob/master/easyexcel-test/src/test/java/com/alibaba/easyexcel/test/demo/write/WriteTest.java 详细文档地址:https://easyexcel.opensource.alibaba.com/docs/current/quickstart/write /** * 最简单的写 * 1. 创建excel...
at com.jiuqi.dna.core.internal.db.datasource.PooledConnection.prepareStatement 通过synchronized关键字,成功获取到了对象的锁,成为监视器的拥有者,在临界区内操作。对象锁是可以线程重入的。 waiting to lock at com.jiuqi.dna.core.impl.CacheHolder.isVisibleIn(CacheHolder.java:165)- waiting to lock <0x00...
excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within ...
This method is thread-safe and typically called (automatically and implicitly) by the try-with-resources statement.The suppression behavior is enabled unless disabled Throwable(String, Throwable, boolean, boolean) via a constructor. When suppression is disabled, this method does nothing other than to...
* This method does nothing if the class is already * initialized prior to invocation. * * @param klass the class for which to force initialization * @return klass */ public static <T> Class<T> forceInit(Class<T> klass) { try { Class...
Text blocks do not directly support string interpolation. Interpolation may be considered in a future JEP. In the meantime, the new instance method String::formatted aids in situations where interpolation might be desired. Text blocks do not support raw strings, that is, strings whose characters ...
Executes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement. Note:This method cannot be called on a PreparedStatement or CallableStatement. Parameters: sql - an SQL Data Manipulation Language (DML...
For more information about how to do this, refer to your ODBC documentation. To connect to a Sybase database, specify nullfor the datasource, and specify the database in the form of server:database_name. For example: devds003:dnet00a A connection object can only be used by one ...