// purpose: demonstrate Java class for objects with three nonnegative values

// version: basic implementation -- just to get something out there.
//          constructor constructors still need work.

import java.util.*;

public class Triple {
	// description has different elements defining the various parts of the
	// of describing, building, and interacting with our object
	//       naming of the attributes
	//       object configurers
	//       accessors for getting and setting attribute values 
	// missing
	//       specializing standard and providing expected behaviors

	// attributes
	int value1;
	int value2;
	int value3;
	
	// Triple(): default constructor
	public Triple() {
		// explicitly set the three values making up the object's attributes
		this.value1 = 0;
		this.value2 = 0;
		this.value3 = 0;
	}
	
	// Triple(): specific constructor
	public Triple( int a, int b, int c ) {
		// set the three values that making up the object's attributes
		this.value1 = a;
		this.value2 = b;
		this.value3 = c;
	}
	
	// get(): returns value of interest
	public int get( int index ) {
		// index specifies which value to return

		if ( index == 0 ) {      // want first value
			return this.value1;
		}
		else if ( index == 1 ) { // want second value
			return this.value2;
		}
		else if ( index == 2 ) { // want third value
			return this.value3;
		}
		else { // illegal index
			return -1;
		}
	}

	// toString(): returns a String representation of our object
	public String toString() {
		// get the attribute values that make up the object

		int a = this.get( 0 );
		int b = this.get( 1 );
		int c = this.get( 2 );

		// concatenate values to build up the string representation
		String result = "[ " + a + ", " + b + ", " + c + " ]";

		// hand back the representation
		return result;
	}
	
	// set(): sets the indicated component
	public void set( int index, int update ) {
		// check to make sure update value is good

		if ( update < 0 ) { // illegal update value, do not update

			return;

		}
		else {              // legal update value, attempt to update

			if ( index == 0 ) {      // update first value
				this.value1 = update;
			}
			else if ( index == 1 ) { // update second value
				this.value2 = update;
			}
			else if ( index == 2 ) { // update third value
				this.value3 = update;
			}
			else { // illegal index, do not update
			}
		}
	}
}