来自另一个类的Java println方法

Question

I'm having a bit of a problem with a method from another class

The method i want to is:

/**
 * Prints out information about the owner
 */
public void printOwnerInfo()
{
    System.out.println("Information about the owner of the forest");
    System.out.println("Name: " + name);
    System.out.println("Adresse: " + adresse);
    System.out.println("Phone Number: " + phone);
}

I would like to have this information printed along side:

/**
 * Prints out information about the forest
 */
public void printForestInfo()
{
    System.out.println("Information about forest: " + name);
    System.out.println("Location: " + location);
    System.out.println("Square meters: " + squareMeters);
    System.out.println("Price per square meter: " + price + " euro");
    System.out.println("Price for the forest: " + (squareMeters * price) + " euro");
    System.out.println.forestOwner.printOwnerInfo();
}

I've declared the "Owner" class in the "Forest" field as:

public Owner forestOwner;

But I can't seem to get it to print out the Owner information with the Forest information. they work fine each on there own.

Answer 1

This makes no sense

System.out.println.forestOwner.printOwnerInfo();

I guess you want to print from the object forestOwner the method printOwnerInfo() so:-

forestOwner.printOwnerInfo();

Which will call the method on the object and the Println s are handled in there

Answer 2

This call doesn't make sense:

System.out.println.forestOwner.printOwnerInfo();

This would only start to be sensible if printOwnerInfo() returned a String (which you're then passing into your System.out.println call), and if you corrected the chain of calls. So, either replace that line with this:

forestOwner.printOwnerInfo()

... or have that owner method return a String instead and call it like so:

System.out.println(forestOwner.printOwnerInfo());

Answer 3

I think you need to do something like the following in the printForestInfo method:

forestOwner.printOwnerInfo();

... as your code prints to the console from within that method. The 'out' field of the System class is declared static and public, thus it is "available" globally.