java deep copy

Shallow copy and deep copy conceptShallow copy (Shallow clone): All variables of the copied object contain the same value as the original object, and all references to other objects still point to the original object. In other words, a shallow copy simply duplicates the obje

written.The first time I used a hash table, I think it is also drunk, but after the optimization of the time gradually 2 hash table 1 hash table.Three methods of solution are actually the same, but initially there are a lot of redundant places.Solution 1: public static Randomlistnode Copyrandomlist (Randomlistnode head) {//define hash table HashmapSolution 2: public static Randomlistnode CopyRandomList2 (Randomlistnode head) {//New two hash tables are stored in the original node and the random

The process of writing an object into a stream is a serialization (serilization) process, but in the Java programming Circle it is also very visually called a "frozen" or "pickled pickle" process, while the parallelization (deserialization) process of reading an object from the stream is called "thawing" or "fresh". Process. It should be noted that a copy of the object is written into the stream, and the or

ois.close (); at}Catch(IOException e) { - e.printstacktrace (); - } - } - if(NULL!=bis) { - Try { in bis.close (); -}Catch(IOException e) { to e.printstacktrace (); + } - } the if(NULL!=Oos) { * Try { $ oos.close ();Panax Notoginseng}Catch(IOException e) { - e.printstacktrace (); the } + } A if(NULL!=Bos) { the Try { + bos.close

Have never heard of these two nouns, these days with the list and map of the time to find the bug, only for the first time on the StackOverflow know there are so two simple terminology can describe the problems I encountered.Written down is based on their own understanding, perhaps inaccurate, if later found not to come back to fix.First, there are only two types of data in Java: Primitive type and object type.The basic data type (primitive type) is a

ext.: http://blog.csdn.net/u014727260/article/details/550034022 points to achieve clone:The 1,clone method is a method of the object class, so any class will automatically have the method2, not all classes can call the Clone method, because JAVAC requires the declaration shown by the programmer by declaring "implements Cloneable" on the classShallow Copy A shallow copy is a bitwise

Preface: What is the difference between deep and shallow copies? Shallow copy: All variables of the copied object contain the same value as the original object, and all references to other objects still point to the original object. In other words, a shallow copy simply duplicates the object being considered, not the object it refers to.

Import Java.util.*;import Java.io.*;class user implements serializable{public String name;public int age;public User ( String str,int num) {name=str;age=num;} Public String toString () {return ' Name: ' +name+ ' \ n ' + ' Age: ' +age;}} Class Test implements Cloneable,serializable{public int height;public user user;public Test (user U,int num) {user=u; Height=num;} Public String toString () {return user+ "\ n" + "Height:" +height;} Public Object Clone () {try {return super.clone ();} catch (Clon

First, let's take a look at the definition of the shortest copy and deep copy: Shallow copy: assign values to the member variables of the newly created instance one by one using a known instance. This method is called shortest copy. De