loader1变量和obj变量间接应用代表Sample类的Class对象,而objClass变量则直接引用它。 如果程序运行过程中,将上图左侧三个引用变量都置为null,此时Sample对象结束生命周期,MyClassLoader对象结束生命周期,代表Sample类的Class对象也结束生命周期,Sample类在方法区内的二进制数据被卸载。 当再次有需要时,会检查Sa
(a)初始化类(initialization of class),是指初始化static field 和执行static初始化块。 例如: classSuper {staticString s = “initializationstaticfield”;//初始化static field,其中“= “initialization static field” ”又叫做static field initializer//static初始化块,又叫做static initializer,或 static initial...
(a)初始化类(initialization of class),是指初始化static field 和执行static初始化块。 例如: classSuper{staticStrings=“initializationstaticfield”;//初始化static field,其中“= “initialization static field” ”又叫做static field initializer// static初始化块,又叫做static initializer,或 static initialization...
publicclassInitializationOrderExample{privatestaticintstaticVariable=1;privateintinstanceVariable=2;static{staticVariable=3;System.out.println("Static block executed.");}{instanceVariable=4;System.out.println("Instance block executed.");}publicInitializationOrderExample(){System.out.println("Constructor execut...
public class OrderOfInitialization { public static void main(String[] args) { Card t = new Card(); t.f(); // Shows that construction is done } 112 } ///:~ 在Card 中,Tag 对象的定义故意到处散布,以证明它们全都会在构建器进入或者发生其他任何事情之前得到 ...
Only the Java Virtual Machine creates Class objects. * This constructor is not used and prevents the default constructor being * generated. */ private Class(ClassLoader loader) { // Initialize final field for classLoader. The initialization value of non-null // prevents future JIT optimizations ...
package com.initializationializationblocks;publicclassInitializationOrderExample{ InitializationOrderExample(intx) { System.out.println("ONE argument constructor"); } InitializationOrderExample() { System.out.println("No argument constructor"); }static{ ...
class [klɑ:s] 类 classpath [klɑ:s’pɑ:θ ] 类路径 public ['p ʌblik] 公共的,公用的 private ['praivit] 私有的,私人的 static ['stæ tik] 静的;静态的;静止的 void [vɔid] 空的,没有返回值的 path [ pɑ:θ ] 路径 ...
Loading（装载）将Java类的Class文件加载到内存中，并创建出类模板对象（存储在方法区中）Linking（链接）...
9、tem.out.println("-Person()-"); t3 = new Pet(33); Pet t2 = new Pet(2); void show() System.out.println("show-running"); Pet t3 = new Pet(3); public class OrderOfInitialization public static void main(String args) Person p = new Person(); p.show(); 【运行结果】: Pet(...