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最新文章列表
深入了解SAP note的技术细节
Although I have been working on ABAP for several years, I am not well aware of the technical design of SAP note, since most of the time as an application developer, I am responsible for the bug fixing ...
Java SE: Effective Java Notes "Concurrency"
Use the Advanced Concurrent Tools instead of the legacy wait() and notify().
Java Advanced Concurrent Tools:
1> Executor Framework: ExecutorService, Callable, Executors ...
2> Concur ...
Java 编程 笔记
1. 方法的连续调用而没有判断,很容易抛出NullPointerException等异常
String infant = session.getAttribute("giant").toString();
session.getAttribute("giant")很可能是null值,再调用toString()会产生空指针异常。
解决方法:
St ...