java引用类型变量

引用类型变量表示在栈中引用了一个地址指向了堆中的对象，那么通常所说的这个变量的值指的是对象还是地址？如果一个引用类型的值为null，如何理解？地址为空还是引用一个地址指向一个空对象？谢谢！

java定义的全局变量（引用类型），加不加final有区别吗？什么区别？

public static final U=new U();public static U=new U();没什么区别吧如果在不同的地方想获得spring同一个容器用定义全局变量的方式可以吗？

【Java 虚拟机原理】Java 引用类型(强引用|软引用|弱引用|虚引用|静态变量)

文章目录一、静态变量二、Java 引用类型(强、软、弱、虚)一、静态变量GC Root 对象:线程栈中的栈帧中的局部变量表中的引用对象;方法区中的静态引用对象;方法区中的常量引用对象;本地方法栈中的 JNI 中的引用的对象;所有的静态...

java更多"变量"相关

.java配置环境变量 .java使用变量 .java变量作用 .java变量是什么 .java什么是变量 .java设置变量 .java变量对象 .java变量问题 .java变量区别 .java线程变量 .java变量数据类型 .java变量final .java基础变量 .java访问变量 .java变量初始化

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