常规编程：如何从“get”方法返回两种原语（'int和'string'）？

Question

Trying to print out age and name of an Object using "get" method. However, my get method return type is string:

public String displayProfile() {
    System.out.print(getName() + getAge());

Hence the error:

This method must return a result of type String

Here is my main method: if user enters '2' from the "menu" where (2 == profile) the program should display user's name and age .

Side note: To select "friends" from menu, user will enter '3' (3 = friends).

public static void main(String[] args) {

// Initializing Objects
People zac = new People();
 zac.setName("zac");
 zac.setAge(18);

 People lisa = new  People();
 lisa.setName("lisa");
 lisa.setAge(19);

 // Zac be-friend LISA
 zac.addFriend("lisa");

    openApp();
    if(optionSelected == 3)
    {
       System.out.println(zac.getFriend());

       else if (optionSelected == 2) {
           System.out.println(zac.displayProfile());
        }
     }
       }

Being new to programming, I want to develop good programming practices, hence with this in mind; how would you display age and name of different type [int = age and string = name] from one method like ie public String displayProfile() OR is this completely wrong? Then what are the alternatives?

Additionally :

My getName() method:

// GET NAME 
    public String getName() {
        return this.name;
    }   

My setName() method:

 // SET NAME 
public  void setName(String name) {
    this.name = name;
    }

My getAge() method:

// GET AGE

    public int getAge() {
        return this.age;
    }

My setAge() method:

// SET AGE

    public void setAge(int age) {
        age = this.age;
        }

Answer 1

You can use String.format() with format specifiers ( %s, %d, %f... )

public static String displayProfile()
{
    return String.format("%s %d", "StackOverflow", 6);
}

Note the return statement. It's totally different than System.out.print(...)

Also, the body of setAge() method, should look like:

this.age = age;

since you want to assign the age passed as parameter to the member this.age