publicvoidtestShallowCopy()throws Exception{ Address address=new Address(); address.setType("Home"); address.setValue("北京"); Person p1=new Person(); p1.setAge(31); p1.setName("Peter"); p1.setAddress(address); Person p2=(Person) p1.clone(); System.out.println(p1==p2);//false...
// Retrieve an input stream from the byte array and read // a copy of the object back in. ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray()); ObjectInputStream in = new ObjectInputStream(bis); obj = in.readObject(); } catch (IOException e) { e.printStackTrace()...
public static T copy(T source, ClassT tClass) throws Exception { return decodeValueIgnoreUnknown(encodeWithoutNull(source), tClass); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 一个简单的工具类,利用了Jackson库,性能一般,不过扩展性好,比java自带序列化很大提升。 性能测试 我在自己的...
package java.lang; /** * A class implements the Cloneable interface to * indicate to the {@link java.lang.Object#clone()} method that it * is legal for that method to make a * field-for-field copy of instances of that class. * * Invoking Object's clone method on an instance tha...
Java 程序创建 ArrayList 的深拷贝。 ArrayList<Employee> employeeList = new ArrayList<>(); employeeList.add(new Employee(1l, "adam", new Date(1982, 02, 12))); ArrayList<Employee> employeeListClone = new ArrayList<>(); Collections.copy(employeeList, employeeListClone); ...
3.2. Deep Copying a Java Collections Creating a deep copy of a collection is rather easy. We need to create a new instance of collection and copy all elements from the given collection into the cloned collection – one by one. Note that we will copy the element’s clone in the cloned ...
java 中如果一个类需要支持 clone 的话,必须要做如下事情: 1. 2. 1. 2. 3. 4. 5. 6. 7. 8. 你必须继承 Cloneable 接口---Cloneable interface is broken in java。otherwise throws java.lang.CloneNotSupportedException. 必须重写 Object 类中的 clone()方法 /* Creates and returns a copy of ...
Java Object class comes with native clone() method that returns the copy of the existing instance. To use java cloning, all you need is to implement the mark…
To learn more on shallow copy, visitWhat is Shallow Copy in Java? We have enclosed theclone()method inside theJava try...catchblock. It is because subclass can throw the exception if the object cannot be cloned. Note: TheObjectclass is the superclass for all the classes in Java. Hence,...
java Arrays类 2019-12-25 17:00 − package com.oracle.demo01; import java.lang.reflect.Array; import java.util.Arrays; //数组类:Arrays public class DemoArrays { public static void... 墨染千城 0 376 java之system类 2019-12-25 22:09 − 1.因为system类为静态的方法,使用类名直接...