Learn from the 'Object Assign' framework in the Java class library
Learn from the 'Object Assign' framework in the Java class library
Introduction:
Java is a commonly used object -oriented programming language. It has a rich class library and framework to simplify and accelerate the development process.In the Java library, Object Assign is an important framework for the attributes of cloned and combined objects.This article will explore the use and working principle of the Object Assign framework and provide relevant Java code examples.
1. Object Assign framework introduction
Object Assign is a tool class in the Java class library, which aims to simplify the clone and merger process of object attributes.This framework can copy the attribute value of the source object to the target object to achieve cloning of the object attribute.In addition, Object Assign can also merge the attributes of multiple objects into a new object.By using the Object Assign framework, developers can easily process the need to copy and consolidate the object attributes to improve development efficiency.
2. Example of Object Assign
Below is a simple Java code example, which demonstrates how to use the Object Assign framework for object attribute cloning and merging:
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
public class ObjectAssignExample {
public static void main(String[] args) {
// clone object attribute
Person sourcePerson = new Person("John", 25);
Person clonedPerson = new Person();
// Use Object Assign to cloning the attribute
ObjectAssign.assign(clonedPerson, sourcePerson);
// The attribute value after the output cloning
System.out.println (CloneDperson.getName ()); // Output: John
System.out.println (cloneDperson.getage ()); // Output: 25
// Merge object attribute
Map<String, Object> targetObject = new HashMap<>();
Map<String, Object> sourceObject1 = new HashMap<>();
Map<String, Object> sourceObject2 = new HashMap<>();
sourceObject1.put("name", "Alice");
sourceObject2.put("age", 30);
// Use Object Assign for attribute merging
ObjectAssign.merge(targetObject, Arrays.asList(sourceObject1, sourceObject2));
// The attribute value after the output merged
System.out.println(targetObject.get("name")); // 输出：Alice
System.out.println (targetObject.get ("Age"); // Output: 30
}
}
// Person class is used to demonstrate the clone of the object attribute
class Person {
private String name;
private int age;
public Person() {
}
public Person(String name, int age) {
this.name = name;
this.age = age;
}
// Getter and Setter method ...
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
In the above examples, a simple Java class called Person is first created to demonstrate the clone of the object attribute.Then, in the main method, the attribute value of the source object SourcePerson uses the ASSIGN method through the Object Assign framework to the clone of the target object object, and the clone of the object attribute is achieved.Next, the attributes of multiple source objects were used to merge the attributes of multiple source objects into a new target object TargetObject to achieve the merger of the object attribute.
3. Object assign working principle
The working principle of the Object Assign framework is very simple.For attribute cloning, the framework searches the corresponding attribute in the source object according to the attribute type and name of the target object, and copy its value to the target object.For attribute mergers, the framework will merge the attributes of multiple source objects one by one into the target object. If the same attributes exist, the source object will cover the previous value.
It should be noted that the attributes of the Object Assign framework require the attributes of the object must have a public Getter and Setter method in order to read and set the attribute values.
Summarize:
Object Assign is an important framework in the Java class library for the attributes of cloning and combined objects.By simplifying the clone and merger of the object attribute, Object Assign can improve the efficiency and readability of developers.Through this in -depth understanding of the Object Assign framework, readers can better use the framework to process the needs of the object attributes.
