Java if a function did not get a parameter

Question

I tried to do something like C++:

public void function(int x = 10) { // If user did not give an parameter, parameter= 10
    }

How can I set the parameter in case he did not get?

Answer 1

In Java, you can achieve it using method overloading

public void function(int x) {

}

public void function() { 
    int x = 10;// If user did not give an argument, argument = 10
    function(x);
}

Answer 2

You'd overload it with a method that doesn't receive a parameter, then call it with the one that you want:

public void function() { function(10); }

Your original function would then just be:

public void function(int x) { // ... body ... }