About method splitting (Java)

Steps to split the method

I wrote verbose code and the readability deteriorated. I would like to split the method by following the steps below.

1. Create printData and fullName methods
2. Describe the contents of the fullName method
3. Describe the contents of the printData method
4. Description for calling the printData method

Main.java

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    
    System.out.print("name:");
    String firstName = scanner.next();
    
    System.out.print("Last name:");
    String lastName = scanner.next();
    
    String name = firstName + " " + lastName;
    
    System.out.print("age:");
    int age = scanner.nextInt();
    
    System.out.print("height(m)：");
    double height = scanner.nextDouble();
    
    System.out.print("body weight(kg)：");
    double weight = scanner.nextDouble();
    
    System.out.println("Name is" + name + "is");
    System.out.println("Age is" + age + "I'm old");
    if (age >= 20) {
      System.out.println("I'm an adult");
    } else {
      System.out.println("I'm a minor");
    }
    System.out.println("How tall are you"+ height + "m");
    System.out.println("Weight" + weight + "kg");
  }
}

Create printData and fullName methods

First, create the printData and fullName methods. The contents can still be empty.

Main.java

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
       //Omitted because it is long
  }
  public static void printData(String firstName, String lastName, int age, double height, double weight) {
  }
  public static String fullName(String firstName, String lastName) {
  }
}

Describe the contents of the fullName method

Describes the return value of the fullName method. Concatenate firstName and lastName as the return value of the fullName method.

Main.java

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    
    System.out.print("name:");
    String firstName = scanner.next();
    
    System.out.print("Last name:");
    String lastName = scanner.next();
    
    //It is deleted because it is no longer needed ↓
    //String name = firstName + " " + lastName;
    
    System.out.print("age:");
    int age = scanner.nextInt();
    
    System.out.print("height(m)：");
    double height = scanner.nextDouble();
    
    System.out.print("body weight(kg)：");
    double weight = scanner.nextDouble();
    
    System.out.println("Name is" + name + "is");
    System.out.println("Age is" + age + "I'm old");
    if (age >= 20) {
      System.out.println("I'm an adult");
    } else {
      System.out.println("I'm a minor");
    }
    System.out.println("How tall are you"+ height + "m");
    System.out.println("Weight" + weight + "kg");
  }
  public static void printData(String firstName, String lastName, int age, double height, double weight) {
  }
  public static String fullName(String firstName, String lastName) {
    //Concatenate firstName and lastName as the return value of the fullName method
    return firstName + " " + lastName;
  }
}

Describe the contents of the printData method

Output the full name using the fullName method. In addition, copy and paste the output such as age from the main method.

Main.java

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    
    System.out.print("name:");
    String firstName = scanner.next();
    
    System.out.print("Last name:");
    String lastName = scanner.next();
    
    System.out.print("age:");
    int age = scanner.nextInt();
    
    System.out.print("height(m)：");
    double height = scanner.nextDouble();
    
    System.out.print("body weight(kg)：");
    double weight = scanner.nextDouble();
    
    //It is deleted because it is no longer needed ↓

    // System.out.println("Name is" + name + "is");
    // System.out.println("Age is" + age + "I'm old");
    // if (age >= 20) {
    //  System.out.println("I'm an adult");
    // } else {
    //  System.out.println("I'm a minor");
    // }
    // System.out.println("How tall are you"+ height + "m");
    // System.out.println("Weight" + weight + "kg");
  }

  public static void printData(String firstName, String lastName, int age, double height, double weight) {
    
    //Call the fullName method and output
    System.out.println("Name is" + fullName(firstName, lastName) + "is");

    //Output age(Copy and paste from the main method)
    System.out.println("Age is" + age + "I'm old");

    //Conditional branching of minors(Copy and paste from the main method)
    if (age >= 20) {
      System.out.println("I'm an adult");
    } else {
      System.out.println("I'm a minor");
    }

    //Output height and weight(Copy and paste from the main method)
    System.out.println("How tall are you" + height + "m");
    System.out.println("Weight" + weight + "kg");
  }

  public static String fullName(String firstName, String lastName) {
    return firstName + " " + lastName;
  }
}

Description for calling the printData method

Finally, add a description to call the printData method to the main method.

Main.java

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    
    System.out.print("name:");
    String firstName = scanner.next();
    
    System.out.print("Last name:");
    String lastName = scanner.next();
    
    System.out.print("age:");
    int age = scanner.nextInt();
    
    System.out.print("height(m)：");
    double height = scanner.nextDouble();
    
    System.out.print("body weight(kg)：");
    double weight = scanner.nextDouble();

    //Call the printData method
    printData(firstName, lastName, age, height, weight);
  }

  public static void printData(String firstName, String lastName, int age, double height, double weight) {
    System.out.println("Name is" + fullName(firstName, lastName) + "is");
    System.out.println("Age is" + age + "I'm old");
    if (age >= 20) {
      System.out.println("I'm an adult");
    } else {
      System.out.println("I'm a minor");
    }
    System.out.println("How tall are you" + height + "m");
    System.out.println("Weight" + weight + "kg");
  }

  public static String fullName(String firstName, String lastName) {
    return firstName + " " + lastName;
  }
}

I think this has improved readability.