Category: Java

2017
0
DevJava

JVM parameters

参数名称 含义 默认值 -Xms 初始堆大小 物理内存的1/64(<1GB) 默认(MinHeapFreeRatio参数可以调整)空余堆内存小于40%时，JVM就会增大堆直到-Xmx的最大限制. -Xmx 最大堆大小 物理内存的1/4(<1GB) 默认(MaxHeapFreeRatio参数可以调整)空余堆内存大于70%时，JVM会减少堆直到 -Xms的最小限制

0
DevJava

Java Currency

Use Thread There are three ways of using Thread: Implementes Runnable interface Implementes Callable interface Extends Thread class Implemeting Runnable and Callable does not create a new real thead

2016
0
DevJava

JasperReport

JasperReports is an open source Java reporting tool that can write to a variety of targets, such as: screen, a printer, into PDF, HTML, Microsoft Excel, RTF, ODT, Comma-separated values or XML files.

0
DevJava

Java Cache System

JCS is a distributed caching system written in Java. It is intended to speed up applications by providing a means to manage cached data of various dynamic natures. Like any caching system, JCS is mos