Student Data adding using Collections using user input

import java.util.Scanner;
public class Main
{
    private String name;
    private int age;
    private double salary;
    
    public Main(){
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter Name: ");
        this.name = sc.nextLine();
        System.out.println("Enter age: ");
        this.age = sc.nextInt();
        System.out.println("Enter Salary: ");
        this.salary = sc.nextDouble();
    }
    
    public Main(String name, int age, double salary){
        
        this.name = name;
        this.age = age;
        this.salary = salary;
        
    }
    
    public String getName(){
        return name;
    }
    
    public int getAge(){
        return age;
    }
    
    public double getSalary(){
        return salary;
    }
    
    
    public void setName(String name)
    {
        this.name = name;
    }
    
    public void setAge(int age){
        this.age = age;
    }
    public void setSalary(double salary)
    {
        this.salary = salary;
    }
    
    public void displayInfo(){
        System.out.println("Name : "+ name);
        System.out.println("Age : "+ age);
        System.out.println("Salary : "+ salary);
    }
	public static void main(String[] args) {
	//	Main emp1 = new Main("John", 23, 3000000);
		
		Main emp1 = new Main();
		emp1.displayInfo();
	}
}