My CompressedArray.java file has a TestCompressedArray.java file that verifies if all functions properly for this exercise. Although, my file doesn't create the identical array that the test file asked for, nor does it output in the way its ask (a right triangle).

Here are the files:

import java.util.Arrays; public class CompressedArray { private int origArraySize; private double array[]; public CompressedArray (double[][] aArray) { int n = aArray.length; int total = (n * (n - 1)) / 2; int i, j, k = 0; origArraySize = total; array = new double[total]; for (i = 0; i < n; i++) { for (j = 0; j < n; j++) { if (i > j) array[k++] = aArray[i][i]; } } } public int getLength () { return origArraySize; } public double getElement(int i) { return array[i]; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } final CompressedArray other = (CompressedArray) obj; if (this.origArraySize != other.origArraySize ) { return false; } if (!Arrays.equals(this.array, other.array)) { return false; } return true; } @Override public String toString() { String t = ""; for (int i = 0; i < this.origArraySize; i++) { t += String.format("%8.2f", array[i]); } return "CompressedArray: " + "Original Array Size=" + origArraySize + " Array=" +t; } }

public class TestCompressedArray {

public static void main(String[] args) {

double[][] origArray1 = new double[][] { new double[] {15.2, 43.6, 28.2, 35.0, 95.5}, new double[] {29.5, 88.3, 72.1, 44.4, 37.4}, new double[] {10.8, 16.4, 74.6, 91.7, 36.2}, new double[] {87.8, 12.2, 63.7, 19.6, 73.1}, new double[] {13.9, 25.0, 77.4, 97.4, 30.5}, }; CompressedArray arr1 = new CompressedArray(origArray1);

// --------------------------------------------------------- // Test 1 - getLength() on a CompressedArray object // --------------------------------------------------------- if (arr1.getLength() == 10) { System.out.println("Test 1 Passed"); } else { System.out.println("Test 1 Failed"); }

// --------------------------------------------------------- // Test 2 - toString() method on a CompressedArray // --------------------------------------------------------- String soln = " 29.50 10.80 16.40 87.80 12.20 63.70 13.90 25.00 77.40 97.40 ";

if (arr1.toString().equals(soln)) { System.out.println("Test 2 Passed"); } else { System.out.println("Test 2 Failed"); }

double[][] origArray2 = new double[][] { new double[] {5.8, 10.4, -4.7, 13.7}, new double[] {10.4, 7.1, -19.3, 4.8}, new double[] {-4.7, -19.3, 5.1, 17.2}, new double[] {13.7, 4.8, 17.2, -6.7} };

double[][] origArray3 = new double[][] { new double[] {5.8, 12.3, -11.6, 21.3}, new double[] {10.4, 7.1, 0.2, 35.0}, new double[] {-4.7, -19.3, 5.1, 18.4}, new double[] {13.7, 4.8, 17.2, -6.7} }; double[][] origArray4 = new double[][] { new double[] {10.4, 7.1, 0.2, 35.0}, new double[] {-4.7, -19.3, 5.1, 18.4}, new double[] {13.7, 4.8, 17.2, -6.7}, new double[] {5.8, 12.3, -11.6, 21.3}, };

CompressedArray arr2 = new CompressedArray(origArray2); CompressedArray arr3 = new CompressedArray(origArray3); CompressedArray arr4 = new CompressedArray(origArray4);

// --------------------------------------------------------- // Test 3 - getLength() on more CompressedArray objects // --------------------------------------------------------- if (arr2.getLength() == 6 && arr3.getLength() == 6 && arr4.getLength() == 6) { System.out.println("Test 3 Passed"); } else { System.out.println("Test 3 Failed"); } // --------------------------------------------------------- // Test 4 - equals() between two CompressedArray objects // --------------------------------------------------------- if (!arr2.equals(arr4) && !arr3.equals(arr4)) { System.out.println("Test 4 Passed"); } else { System.out.println("Test 4 Failed"); } // --------------------------------------------------------- // Test 5 - equals() between two CompressedArray objects // ---------------------------------------------------------

if (arr2.equals(arr3)) { System.out.println("Test 5 Passed"); } else { System.out.println("Test 5 Failed"); }

} }

Thanks for any assistance!