REFACTORING Moved some methodes in order to get a cleaner Struckture

src/main/java/com/ugsbo/matrixcalc/MatrixCalcController.java

@@ -5,9 +5,6 @@ import javafx.scene.control.*;
 import javafx.scene.text.Text;
 import javafx.scene.text.TextAlignment;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
 public class MatrixCalcController {
 
     // Hier werden die fx:id Attribute verknuepft.
@@ -35,77 +32,22 @@ public class MatrixCalcController {
          * Convert Strings to matricies, multiply them and output the result.
          */
         multiplyButton.setOnMouseClicked((event) -> {
+            MatrixCalcMath math = new MatrixCalcMath();
+            MatrixCalcIOUtils util = new MatrixCalcIOUtils();
+
             String stringMatrixA = matrixATextArea.getText();
             String stringMatrixB = matrixBTextArea.getText();
-            if (checkInput(stringMatrixA) && checkInput(stringMatrixB)) {
-                MatrixCalcMath math = new MatrixCalcMath();
+            if (util.checkInput(stringMatrixA) && util.checkInput(stringMatrixB)) {
 
-                double[][] matrixA = math.stringToMatrix(stringMatrixA);
-                double[][] matrixB = math.stringToMatrix(stringMatrixB);
+                double[][] matrixA = util.stringToMatrix(stringMatrixA);
+                double[][] matrixB = util.stringToMatrix(stringMatrixB);
                 double[][] result = math.matrixMultiplication(matrixA, matrixB);
 
-                outputMatrixToOutputText(result);
-            }
-            // System.out.println(matrixATextArea.getText());
-        });
-    }
-    /**
-     * Prints a given 2D-Array to the output text Field.
-     * @param output2DArray The Array that gets Displayed
-     */
-    private void outputMatrixToOutputText(double[][] output2DArray) {
-        //convert array to String
-        String DisplayableString = convertsArrayToStringInOrderToDisplayIt(output2DArray);
-        // Display output
+                String DisplayableString = util.outputMatrixToOutputText(result);
                 outputText.setText(DisplayableString);
                 outputText.setTextAlignment(TextAlignment.CENTER);
             }
-    /**
-     * Converts Array to String in oder to Display it.
-     * @param array2D the array wich will be converted to an Displayable String
-     * @return The Displayable String
-     */
-    private String convertsArrayToStringInOrderToDisplayIt(double[][] array2D) {
-        String displayableString = "";
-        for (int i = 0; i < array2D.length; i++) {
-            for (int j = 0; j < array2D[0].length; j++) {
-                displayableString += array2D[i][j] + "   ";
-                // System.out.println(result[i][j]);
-            }
-            displayableString += "\n\n";
-        }
-        return displayableString;
-    }
-
-    /**
-     * Chcks if the Input is Valid, with Regex. Returns true if the Matrix can be
-     * matched by the regular Expression.
-     * 
-     * @param matrix It is the InputMatrix
-     * @return true if the Matrix is valid Input.
-     */
-    public boolean checkInput(String matrix) {
-        boolean isMatched = false;
-        if (matrix.length() == 0) {
-            throw new IllegalArgumentException("Please insert a Matrix");
-        }
-
-        // Matches digits witch following spaces 1 to 3 times
-        String row1 = "(\\d*\\u0020*){1,3}";
-        // Matches newlineCurrierReturn followed by digits witch following spaces 1 to
-        // 3times
-        String row2 = "(\\n){0,3}(\\d*\\u0020*){0,3}";
-        String row3 = "(\\n){0,3}(\\d*\\u0020*){0,3}";
-
-        // TODO get the input check more stricktly missing matrix slots are allowed.
-
-        Pattern p = Pattern.compile(row1 + row2 + row3);
-        Matcher m = p.matcher(matrix);
-
-        isMatched = m.matches();
-
-        // System.out.println(isMatched);
-        return isMatched;
+            // System.out.println(matrixATextArea.getText());
+        });
     }
-
 }

src/main/java/com/ugsbo/matrixcalc/MatrixCalcIOUtils.java

@@ -0,0 +1,101 @@
+package com.ugsbo.matrixcalc;
+
+import java.util.ArrayList;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class MatrixCalcIOUtils {
+    /**
+     * Prints a given 2D-Array to the output text Field.
+     * 
+     * @param output2DArray The Array that gets Displayed
+     */
+    protected String outputMatrixToOutputText(double[][] output2DArray) {
+        // convert array to String
+        String DisplayableString = convertsArrayToStringInOrderToDisplayIt(output2DArray);
+        // Display output
+        return DisplayableString;
+    }
+
+    /**
+     * Converts Array to String in oder to Display it.
+     * 
+     * @param array2D the array wich will be converted to an Displayable String
+     * @return The Displayable String
+     */
+    protected String convertsArrayToStringInOrderToDisplayIt(double[][] array2D) {
+        String displayableString = "";
+        for (int i = 0; i < array2D.length; i++) {
+            for (int j = 0; j < array2D[0].length; j++) {
+                displayableString += array2D[i][j] + "   ";
+                // System.out.println(result[i][j]);
+            }
+            displayableString += "\n\n";
+        }
+        return displayableString;
+    }
+
+    /**
+     * Chcks if the Input is Valid, with Regex. Returns true if the Matrix can be
+     * matched by the regular Expression.
+     * 
+     * @param matrix It is the InputMatrix
+     * @return true if the Matrix is valid Input.
+     */
+    protected boolean checkInput(String matrix) {
+        boolean isMatched = false;
+        if (matrix.length() == 0) {
+            throw new IllegalArgumentException("Please insert a Matrix");
+        }
+
+        // Matches digits witch following spaces 1 to 3 times
+        String row1 = "(\\d*\\u0020*){1,3}";
+        // Matches newlineCurrierReturn followed by digits witch following spaces 1 to
+        // 3times
+        String row2 = "(\\n){0,3}(\\d*\\u0020*){0,3}";
+        String row3 = "(\\n){0,3}(\\d*\\u0020*){0,3}";
+
+        // TODO get the input check more stricktly missing matrix slots are allowed.
+
+        Pattern p = Pattern.compile(row1 + row2 + row3);
+        Matcher m = p.matcher(matrix);
+
+        isMatched = m.matches();
+
+        // System.out.println(isMatched);
+        return isMatched;
+    }
+
+    /**
+     * Converts a String form the Inputfield to an 2D-Array aka Matrix.
+     * 
+     * @param stringMatrix The String form the Inputfield
+     * @return Matrix as a 2D-Array
+     */
+    public double[][] stringToMatrix(String stringMatrix) {
+
+        ArrayList<String[]> singleNumbersArr = new ArrayList<String[]>();
+
+        // Splitting the strings into their rows
+        String[] singleNumbers = null;
+        String[] rows = stringMatrix.split("\n");
+        for (int i = 0; i < rows.length; i++) {
+            // System.out.println(rows[i]);
+            // Splitting rows into their Numbers
+            singleNumbers = rows[i].split("\\s");
+            singleNumbersArr.add(singleNumbers);
+        }
+
+        int rowlength = singleNumbersArr.get(0).length; // row.length
+        int columCount = singleNumbersArr.size(); // output.length
+        double[][] matrix = new double[columCount][rowlength];
+
+        for (int columIndex = 0; columIndex < columCount; columIndex++) {
+            for (int rowIndex = 0; rowIndex < singleNumbers.length; rowIndex++) {
+                matrix[columIndex][rowIndex] = Double.parseDouble(singleNumbersArr.get(columIndex)[rowIndex]);
+            }
+        }
+        return matrix;
+    }
+
+}

src/main/java/com/ugsbo/matrixcalc/MatrixCalcMath.java

@@ -227,31 +227,4 @@ public class MatrixCalcMath {
         }
         return false;
     }
-
-    public double[][] stringToMatrix(String stringMatrix) {
-        
-        ArrayList<String[]> singleNumbersArr =  new ArrayList<String[]>();
-        
-        //Splitting the strings into their rows
-        String[] singleNumbers = null;
-        String[] rows = stringMatrix.split("\n");
-        for (int i = 0; i < rows.length; i++) {
-            //System.out.println(rows[i]);
-        	//Splitting rows into their Numbers
-            singleNumbers = rows[i].split("\\s");
-            singleNumbersArr.add(singleNumbers);
-        }
-
-        int rowlength = singleNumbersArr.get(0).length; //row.length
-        int columCount = singleNumbersArr.size(); //output.length
-        double[][] result = new double[columCount][rowlength];
-        
-        for (int columIndex = 0; columIndex < columCount; columIndex++) {
-            for (int rowIndex = 0;  rowIndex < singleNumbers.length; rowIndex++) {
-                    result[columIndex][rowIndex] = Double.parseDouble(singleNumbersArr.get(columIndex)[rowIndex]);
-            }
-        }
-        return result;
-    }
-
 }

src/test/java/com/ugsbo/matrixcalc/StringToMatrixTest.java → src/test/java/com/ugsbo/matrixcalc/MatrixIOUtilsTest.java

@@ -1,21 +1,55 @@
 package com.ugsbo.matrixcalc;
 
 import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 import org.junit.Before;
 import org.junit.Test;
 
 /**
- * Tests the funktionality to Calculate the Determinant of a Matrix.
+ * Tests how well worng input can be determent.
  */
-public class StringToMatrixTest {
+public class MatrixIOUtilsTest {
 
-    private MatrixCalcMath matrixMath;
+    private MatrixCalcIOUtils util;
 
     @Before
     public void setup() {
-        matrixMath = new MatrixCalcMath();
+        util = new MatrixCalcIOUtils();
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void inputEmptySouldThrowAIllegalArgumentException() {
+        String input = "";
+
+        util.checkInput(input);
+    }
+
+    @Test
+    public void checkIfA1by3MatrixIsValidInput() {
+        String input = "1 2 3";
+
+        boolean result = util.checkInput(input);
+
+        assertTrue("The 1 by 3 Matrix should be Matched as valid input.", result);
+    }
+
+    @Test
+    public void checkIfA2by3MatrixIsValidInput() {
+        String input = "1 2 3\n1 2 3";
+
+        boolean result = util.checkInput(input);
+
+        assertTrue("The 2 by 3 Matrix should be Matched as valid input.", result);
+    }
+
+    @Test
+    public void checkIfA3by3MatrixIsValidInput() {
+        String input = "1 2 3\n1 2 3\n1 2 3";
+
+        boolean result = util.checkInput(input);
+
+        assertTrue("The 3 by 3 Matrix should be Matched as valid input.", result);
     }
 
     @Test
@@ -23,7 +57,7 @@ public class StringToMatrixTest {
         String inputString = "1";
         double[][] expected = { { 1.0 } };
 
-        double[][] result = matrixMath.stringToMatrix(inputString);
+        double[][] result = util.stringToMatrix(inputString);
 
         assertArrayEquals("The first row is not correct", expected[0], result[0], 0.1);
     }
@@ -33,7 +67,7 @@ public class StringToMatrixTest {
         String inputString = "1 2\n3 4";
         double[][] expected = { { 1.0, 2.0 }, { 3.0, 4.0 } };
 
-        double[][] result = matrixMath.stringToMatrix(inputString);
+        double[][] result = util.stringToMatrix(inputString);
 
         assertArrayEquals("The first row is not correct", expected[0], result[0], 0.1);
         assertArrayEquals("The second row is not correct", expected[1], result[1], 0.1);
@@ -44,7 +78,7 @@ public class StringToMatrixTest {
         String inputString = "1 2 3 4 5 6";
         double[][] expected = { { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 } };
 
-        double[][] result = matrixMath.stringToMatrix(inputString);
+        double[][] result = util.stringToMatrix(inputString);
 
         assertArrayEquals("The first row is not correct", expected[0], result[0], 0.1);
     }
@@ -54,7 +88,7 @@ public class StringToMatrixTest {
         String inputString = "1 2 3\n4 5 6";
         double[][] expected = { { 1.0, 2.0, 3.0 }, { 4.0, 5.0, 6.0 } };
 
-        double[][] result = matrixMath.stringToMatrix(inputString);
+        double[][] result = util.stringToMatrix(inputString);
 
         assertArrayEquals("The first row is not correct", expected[0], result[0], 0.1);
         assertArrayEquals("The second row is not correct", expected[1], result[1], 0.1);
@@ -65,7 +99,7 @@ public class StringToMatrixTest {
         String inputString = "1 2\n3 4\n5 6";
         double[][] expected = { { 1.0, 2.0 }, { 3.0, 4.0 }, { 5.0, 6.0 } };
 
-        double[][] result = matrixMath.stringToMatrix(inputString);
+        double[][] result = util.stringToMatrix(inputString);
 
         assertArrayEquals("The first row is not correct", expected[0], result[0], 0.1);
         assertArrayEquals("The second row is not correct", expected[1], result[1], 0.1);
@@ -77,7 +111,7 @@ public class StringToMatrixTest {
         String inputString = "1 2 3\n4 5 6\n7 8 9";
         double[][] expected = { { 1.0, 2.0, 3.0 }, { 4.0, 5.0, 6.0 }, { 7.0, 8.0, 9.0 } };
 
-        double[][] result = matrixMath.stringToMatrix(inputString);
+        double[][] result = util.stringToMatrix(inputString);
 
         assertArrayEquals("The first row is not correct", expected[0], result[0], 0.1);
         assertArrayEquals("The second row is not correct", expected[1], result[1], 0.1);

src/test/java/com/ugsbo/matrixcalc/MatrixInputcheckTest.java

@@ -1,53 +0,0 @@
-package com.ugsbo.matrixcalc;
-
-import static org.junit.Assert.assertTrue;
-
-import org.junit.Before;
-import org.junit.Test;
-
-/**
- * Tests how well worng input can be determent.
- */
-public class MatrixInputcheckTest {
-
-    private MatrixCalcController controller;
-
-    @Before
-    public void setup() {
-        controller = new MatrixCalcController();
-    }
-
-    @Test(expected = IllegalArgumentException.class)
-    public void inputEmptySouldThrowAIllegalArgumentException() {
-        String input = "";
-
-        controller.checkInput(input);
-    }
-
-    @Test
-    public void checkIfA1by3MatrixIsValidInput() {
-        String input = "1 2 3";
-
-        boolean result = controller.checkInput(input);
-
-        assertTrue("The 1 by 3 Matrix should be Matched as valid input.", result);
-    }
-
-    @Test
-    public void checkIfA2by3MatrixIsValidInput() {
-        String input = "1 2 3\n1 2 3";
-
-        boolean result = controller.checkInput(input);
-
-        assertTrue("The 2 by 3 Matrix should be Matched as valid input.", result);
-    }
-
-    @Test
-    public void checkIfA3by3MatrixIsValidInput() {
-        String input = "1 2 3\n1 2 3\n1 2 3";
-
-        boolean result = controller.checkInput(input);
-
-        assertTrue("The 3 by 3 Matrix should be Matched as valid input.", result);
-    }
-}