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How to deserialize Java objects from Reader stream in Java using flexjson?

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Release: 2023-09-10 22:57:04
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How to deserialize Java objects from Reader stream in Java using flexjson?

Flexjson is a lightweight library for serializing and deserializing Java objects into JSON format. JSON format. We can deserialize Java objects from a Reader stream using the deserialize() method of the JSONDeserializer class, which uses an instance of the Reader class as JSON input.

Syntax

public T deserialize(Reader input)
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Example

import java.io.*;
import flexjson.JSONDeserializer;
public class JSONDeserializeReaderTest {
   public static void main(String[] args) {
      JSONDeserializer<Student> deserializer = new JSONDeserializer<Student>();
      String jsonStr =
                       "{" +
                        "\"firstName\": \"Adithya\"," +
                        "\"lastName\": \"Sai\"," +
                        "\"age\": 25," +
                        "\"address\": \"Hyderabad\"" +
                        "\"class\": \"Student\"" +
                       "}";
      Student student = deserializer.deserialize(new StringReader(jsonStr));
      System.out.println(student);
   }
}
// Student class
class Student {
   private String firstName;
   private String lastName;
   private int age;
   private String address;
   public Student() {}
   public Student(String firstName, String lastName, int age, String address) {
      super();
      this.firstName = firstName;
      this.lastName = lastName;
      this.age = age;
      this.address = address;
   }
   public String getFirstName() {
      return firstName;
   }
   public void setFirstName(String firstName) {
      this.firstName = firstName;
   }
   public String getLastName() {
      return lastName;
   }
   public void setLastName(String lastName) {
      this.lastName = lastName;
   }
   public int getAge() {
      return age;
   }
   public void setAge(int age) {
      this.age = age;
   }
   public String getAddress() {
      return address;
   }
   public void setAddress(String address) {
      this.address = address;
   }
   public String toString() {
      return "Student[ " +
      "firstName = " + firstName +
      ", lastName = " + lastName +
      ", age = " + age +
      ", address = " + address +
      " ]";
   }
}
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Output

Student[ firstName = Adithya, lastName = Sai, age = 25, address = Hyderabad ]
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source:tutorialspoint.com
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