栈上分配可以支持方法逃逸,但不能支持线程逃逸 标量替换:若一个数据已经无法再分解成更小的数据(int char long)来表示就称为标量,如果一个数据可以继续分解(Java对象),那它就被称为聚合量。如果把一个Java对象拆散,根据程序访问的情况,将其用到的成员变量 恢复为原始类型来访问,这个过程就称为标量替换。假如逃逸...
When we want to copy an object in Java, there are two possibilities that we need to consider,a shallow copy and a deep copy. For the shallow copy approach, we only copy field values, therefore the copy might be dependant on the original object. In the deep copy approach, we make sure...
importjava.io.*;// 深拷贝工具类publicclassDeepCopyUtil{// 深拷贝方法publicstatic<T>TdeepCopy(Tobject){try{// 写入对象ByteArrayOutputStreambyteOut=newByteArrayOutputStream();ObjectOutputStreamout=newObjectOutputStream(byteOut);out.writeObject(object);out.flush();// 读取对象ByteArrayInputStreambyte...
json-io preserves object references, handles polymorphic types, and maintains cyclic relationships in your data structures. Whether you're working with sophisticated domain models, dealing with legacy Java objects, or need high-performance JSON processing, json-io provides a robust solution with minimal...
toString(); } @Override protected Object clone() throws CloneNotSupportedException { return super.clone(); } } 再次运行刚才的程序, 打印如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 daily.javacopy.Person@d44fc21 daily.javacopy.Edu@23faf8f2 huyanshi 18daily.javacopy.Edu@23faf8f2...
Java deep copy public static <E> E deepClone(E object) throws IOException, ClassNotFoundException { ByteArrayOutputStream bo = new ByteArrayOutputStream(); ObjectOutputStream oo = new ObjectOutputStream(bo); oo.writeObject(object); ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByte...
private <T> List<T> deepCopy(List<T> src) throws IOException, ClassNotFoundException { ByteArrayOutputStream byteOut = new ByteArrayOutputStream(); ObjectOutputStream out = new ObjectOutputStream(byteOut); out.writeObject(src); ByteArrayInputStream byteIn = new ByteArrayInputStream(byteOut.to...
第二种是将对象序列化为json,通过json来实现拷贝,这种方式需要用到net.sf.json.JSONObject。 具体代码如下: public class DeepCopy { /** * 深层拷贝 * * @param * @param obj * @return * @throws Exception */ public static T copy(T obj) throws Exception { ...
但是将两个对象打印出来发现，地址其实是⼀样的，test只是刚刚在堆上分配的Test对象的引⽤，⽽这⾥的赋值直接是引⽤直接的赋值，等于test2也是指向刚刚new出来的对象，这⾥的copy就是⼀个shallow copy，及只是copy了⼀份引⽤，但是对象实体并未copy，既然赋值不⾏，那就试试第⼆个⽅法，Object...
第二种是将对象序列化为json,通过json来实现拷贝,这种方式需要用到net.sf.json.JSONObject。 具体代码如下: public class DeepCopy { /** * 深层拷贝 * * @param <T> * @param obj * @return * @throws Exception */ public static <T> T copy(T obj) throws Exception { ...