Thread: Java Program Help

Read the tutorial on defining a class: Classes (The Java™ Tutorials > Learning the Java Language > Classes and Objects)
And the one on generics: Lesson: Generics (Updated) (The Java™ Tutorials > Learning the Java Language)

Start with a few lines of code that defines each class and nothing more. Compile them, fix the errors and continue until no errors.

Post the code and ask any questions about the problems you are having. Be sure to copy and paste here any error messages.

Ok. I tinkered around last night and this is what I came up with.

package lab2;
 
public class OrderedPair<F, S>{ 
 
 
	public F getFirst;
	public S getSecond;
 
	private F first;
	private S second;
 
	public OrderedPair(F first, S second ){
		this.first = first;
		this.second = second;
	}
public F getFirst() { return first; }
public S getSecond() {return second;}
 
// Five pairs of data 
OrderedPair<String, Integer> c1 = new OrderedPair<String, Integer>("Pi", 3);
OrderedPair<String,String> c2 = new OrderedPair<String, String>("Great", "Super");
OrderedPair<Integer, Integer> c3 = new OrderedPair<Integer, Integer>(1, 2);
OrderedPair<Float, String> c4 = new OrderedPair<Float, String>( 5f, "Maximum");
OrderedPair<Integer, Float> c5 = new OrderedPair<Integer, Float>(69, 69f);
 
 
}

Now. Is this optimized? Or is there a way to cut it down? And from here I need to create a test class. I was thinking of running a Scanner and getting input from the user about how many pairs they want displayed. How would I Print out these pairs?











Would it be just something like:

System.out.println(" Here are your pair(s): /n" + c1);
Thank you for your help.

Please edit your post and wrap your code with code tags:
[code=java]
YOUR CODE GOES HERE
[/code]
to get highlighting and preserve formatting.

Would it be just something like:

System.out.println(" Here are your pair(s): /n" + c1);

That println() would need the classes to have a toString() method that returned a String describing the contents of the object.

Is this optimized? Or is there a way to cut it down?

Get it working first, then if there are problems, work on changing it.