Singleton

There's a class named A:

class A {
    
    private static A instance;
    
    private String s;
    
    private A (String s) {
        this.s = s;
    }

    public static A getInstance(String s) {
        if (instance == null) {
            instance = new A(s);
        }
        return instance;
    }
    
    public static A getNewInstance(String s) {
        return new A(s);
    }
    
    public String getS() {
        return s;
    }
}

How many times does the following code output "foo"?

System.out.println(A.getInstance("foo").getS());
System.out.println(A.getInstance("bar").getS());
System.out.println(A.getNewInstance("foo").getS());
System.out.println(A.getNewInstance("bar").getS()); 
A instance = A.getInstance("thx");
System.out.println(instance.getS());