What is a 'caller'?

public class PezDispenser {
        // first the made an instance of PezDispenser;
        // Pezdispenser dispenser = new PezDispenser("Yoda";
        // this instance has the string mCharakterName
    private String mCharakterName;

        // Here the "Yoda" of the instance of Pezdispenser ( the dispenser)
        // gets assigned to mCharakterName
    public PezDispenser(String charakterName) {
        mCharakterName = charakterName;
    }
    // and here is the method which returns the mCharakterName
    public String getCharakterName() {
        return mCharakterName;
    }
}

PezDispenser dispenser = new PezDispenser("Yoda");
// to assign a value to mCharakterName
System.out.println("The dispenser charakter  is %s\n", dispenser.getCharakterName());
// and here he wanted to get the charakters name with the method getCharakterName of the PezD instance dispenser
// this method is the caller of the private String mCharakterName. Which got it's value with the creation of the instance