Analysis of ‘Object Assign’ Framework Features
Analysis of ‘Object Assign’ Framework Features
In the Java library, there is a very convenient framework feature called ‘Object Assign’.This feature allows us to allocate the attribute value of one object to another, thereby simplifying the assignment operation between objects.
The main role of ‘Object Assign’ characterized is to copy the attribute values of the source object to the target object.This operation is based on attributes, not the object.In other words, it will copy each attribute value of the source object one by one to the target object.
In order to better understand this feature, let's take a look at an example:
import java.util.*;
class Person {
String name;
int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
}
public class Main {
public static void main(String[] args) {
Person source = new Person("John", 25);
Person target = new Person("", 0);
Object.assign(target, source);
System.out.println(target);
}
}
In the above example, we have a class called `Person`, which have two attributes:` name` and `age`.We have created a source object, source` and a target object `target`.Source object `source` has a non -empty` name` attribute and a non -zero `Age` attribute.
Then, we use the `Object.assignig method to allocate the attribute values of the source object to the target object.In this case, the value of the `name` attribute is copied to the` name` attribute of the target object, and the value of the `Age` attribute is copied to the` Age` property of the target object.
Finally, we print the value of the target object.The output result should be `Person {name = 'John', Age = 25}`.
It should be noted that the `Object.assigni method will only copy the attribute values of the source object without creating a new object.Therefore, the target object must exist before assigning.
In addition, the `Object.assigni method also supports assigning the attributes of multiple source objects to the target object.The example is as follows:
import java.util.*;
class Person {
String name;
int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
}
public class Main {
public static void main(String[] args) {
Person source1 = new Person("John", 25);
Person source2 = new Person("Doe", 30);
Person target = new Person("", 0);
Object.assign(target, source1, source2);
System.out.println(target);
}
}
In the above example, we created two source objects `source1` and` source2`, and the initial value of the target object `target` is empty.We allocate the attribute values of the two sources to the target object.
Finally, we print the value of the target object.The output result should be `Person {name = 'doe', age = 30}`.
To sum up, the ‘Object Assign’ framework features in the Java class library are a convenient tool for simplifying object attribute assignment operation.It can copy the attribute values of the source object one by one to the target object, and implement it through the `Object.assigniGn` method.It can be used to allocate the attribute values of a single or more source objects to the target object and will not create new objects.If you want to simplify the attribute assignment operation between the objects, then the ‘Object Assign” characteristic is your good helper.
