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本文源码GitHub:知了一笑https://github.com/cicadasmile/springbootbase一、JAP框架简介JPA(JavaPersistenceAPI)意即Java持久化API，是Sun官方在JDK5.0后提出的Java持久化规范。主要是为了简化持久层开

varfoo:Array"one","two","three";trace(foo1);//"tow",数组下标从0开始trace(foo.length);//3Array的length属性是可读可写的,这与Java不同,在Java中,数组一旦定义好长度,就无法再更改

<divid"cnblogs\_post\_body"class"blogpostbody"<p在解释Java中FileInputStream和FileReader的具体区别之前，我想讲述一下Java中InputStream和Reader的根本差异，以及分别什么时候使用InputStream和Reader。实际上，InputStream和Re

看到一个有意思的点,openjdk里如何定义class相关方法源码地址：http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/777356696811/src/java.base/share/native/libjava/Class.cdefineOBJ"Ljava/lang/Object;"

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