angepasster readCsv() Aufruf

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

@@ -0,0 +1,5 @@
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/PR1-Spreadsheet.iml" filepath="$PROJECT_DIR$/PR1-Spreadsheet.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java

@@ -1,6 +1,7 @@
 package de.hs_mannheim.informatik.spreadsheet;
 
 import java.io.FileNotFoundException;
+import java.util.Scanner;
 
 /**
  * Part of a simplified spreadsheet system for the PR1 programming lab at Hochschule Mannheim.
@@ -11,19 +12,43 @@ public class Axel {
 
 	public static void main(String[] args) throws FileNotFoundException {
 		Spreadsheet spr = new Spreadsheet(10,10);
+		spr.readCsv("C:/Users/kisne/IdeaProjects/PR1-Spreadsheet/tmp/test.csv", ",");
+		Scanner keyboard = new Scanner(System.in);
 
 		spr.put("A3", "123");
-		spr.put("A2", "1");
+		spr.put("A2", "3");
+		spr.put("A5", "5");
+		spr.put("B8", "6");
+		
+
+		spr.put("A8", "=Summe(A5:D8)");
+		spr.put("J7", "=a2+2");
+		spr.put("J8", "=a2+J7*4");
+
 
-		spr.put("B9", "=41+A2");
-		spr.put("J5", "=7*6");
-		spr.put("J6", "=3/2");
 
 		System.out.println(spr);
 
-		spr.saveCsv("/tmp/test.csv");
+		while(true){
+			System.out.print("Please enter the cell name (e.g. D8, G5): ");
+			String cellName = keyboard.nextLine();
+
+			System.out.print("Please enter your value or your formula (starting with '='): ");
+			String cellValue = keyboard.nextLine();
+
+			spr.put(cellName, cellValue);
+
+			System.out.println(spr);
+
+			System.out.print("Do you want to end the program? Y/N: ");
+			if(keyboard.nextLine().equalsIgnoreCase("Y")){
+				break;
+			}
+
+		}
+
+		spr.saveCsv("C:/Users/kisne/IdeaProjects/PR1-Spreadsheet/tmp/test.csv");
 		
-		// TODO: You might want to put "UI loop" for entering value and formulas here resp. in some UI methods.
 	}
 
 }

Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java

@@ -1,11 +1,17 @@
 package de.hs_mannheim.informatik.spreadsheet;
 
+import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.lang.reflect.Array;
+import java.util.ArrayList;
+import java.util.Scanner;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+
+
 /**
  * A simplified spreadsheet class for the PR1 programming lab at Hochschule Mannheim.
  * One aspect worth mentioning is that it only supports long numbers, not doubles.
@@ -20,16 +26,18 @@ public class Spreadsheet {
 	 * @param rows number of rows
 	 * @param cols number of columns
 	 */
-	public Spreadsheet(int rows, int cols) {
-
-		// TODO limit the maximum size on 99 (1..99) rows and 26 (A..Z) columns
+	public Spreadsheet(int rows, int cols) throws IllegalArgumentException {
 
+		if(rows < 1 || rows > 99 || cols < 1 || cols > 26){
+			throw new IllegalArgumentException("Range in rows 1-99; Range in cols 1-26");
+		}else {
 			cells = new Cell[rows][cols];
 
 			for (int r = 0; r < rows; r++)
 				for (int c = 0; c < cols; c++)
 					cells[r][c] = new Cell();
 		}
+	}
 
 	// -----
 	// retrieve or change values of cells
@@ -62,6 +70,8 @@ public class Spreadsheet {
 	}
 
 	private int getRow(String cellName) {
+		if(cellName.length()==3){
+			return Integer.parseInt(cellName.substring(1))-1;}
 		return cellName.charAt(1) - '1';
 	}
 
@@ -72,18 +82,44 @@ public class Spreadsheet {
 	 * A method for reading in data from a CSV file.
 	 * @param path The file to read.
 	 * @param separator The char used to split up the input, e.g. a comma or a semicolon.
-	 * @param starCellName The upper left cell where data from the CSV file should be inserted.
-	 * @return Nothing.
 	 * @exception IOException If path does not exist.
 	 */
-	public void readCsv(String path, char separator, String startCellName) throws FileNotFoundException {
-		// TODO: implement this
+	public void readCsv(String path, String separator) throws FileNotFoundException {
+
+			ArrayList<String> lines = new ArrayList<>();
+			Scanner scan = new Scanner(new File(path));
+
+			while (scan.hasNextLine()) {
+				lines.add(scan.nextLine());
 			}
 
+			String[] linesArray = lines.toArray(new String[lines.size()]);
+			ArrayList<int[]> values = new ArrayList<>();
+			for(int i = 0; i < linesArray.length; i++) {
+				//System.out.println(linesArray[i]);
+				String[] zwischenSchritt = linesArray[i].split(separator);
+				for (int j = 0; j < zwischenSchritt.length; j++) {
+					System.out.println(zwischenSchritt[j]);
+					if(zwischenSchritt[j].startsWith("=")){
+						values.add(new int[]{i, j});
+					}else{
+						this.put(i, j, zwischenSchritt[j]);
+					}
+
+				}
+				for(int[] cell : values){
+					String[] value = linesArray[cell[0]].split(",");
+					String formula = value[cell[1]];
+					this.put(cell[0], cell[1], formula);
+				}
+				scan.close();
+			}
+
+
+	}
 	/**
 	 * A method for saving data to a CSV file.
 	 * @param path The file to write.
-	 * @return Nothing.
 	 * @exception IOException If path does not exist.
 	 */
 	public void saveCsv(String path) throws FileNotFoundException {
@@ -96,7 +132,7 @@ public class Spreadsheet {
 				else
 					out.print(cell.getValue());
 
-				if (cell != row[cells.length-1])
+				if (cell != row[cells[0].length-1])
 					out.print(",");
 			}
 			out.println();
@@ -107,25 +143,27 @@ public class Spreadsheet {
 
 	/**
 	 * This method does the actual evaluation/calcluation of a specific cell
-	 * @param cellName the name of the cell to be evaluated
-	 * @return Nothing.
+	 * @param row the row of the cell to be evaluated
+	 * @param col the col of the cell to be evaluated
 	 */
 	private void evaluateCell(int row, int col) {
 		String formula = cells[row][col].getFormula();
 		String result = "";
+		int colon = formula.indexOf(':');
+		String endSubstring = formula.substring((colon + 1), (formula.length()-1));
 
 		if (formula.startsWith("SUMME("))  // e.g. SUMME(A3:A8)
-			result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));  // TODO adapt to cells with two digits
+			result = "" + sum(formula.substring(6, colon), endSubstring);
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
-			result = "TODO"; // TODO
+			result = "" + prod(formula.substring(8, colon), endSubstring);
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
-			result = "TODO"; // TODO
+			result = "" + mit(formula.substring(11, colon), endSubstring);
 		else if (formula.startsWith("STABW("))  // e.g. STABW(C6:D8) -> Standardabweichung
-			result = "TODO"; // TODO
-		else if (formula.startsWith("MIN("))  // e.g. MIN(C13:H13) -> größter Wert
-			result = "TODO"; // TODO
-		else if (formula.startsWith("MAX("))  // e.g. MAX(A1:A10) -> Standardabweichung
-			result = "TODO"; // TODO
+			result = "" + stabw(formula.substring(6, colon), endSubstring);
+		else if (formula.startsWith("MIN("))  // e.g. MIN(C13:H13) -> kleinster Wert
+			result = "" + min(formula.substring(4, colon), endSubstring);
+		else if (formula.startsWith("MAX("))  // e.g. MAX(A1:A10) -> größter Wert
+			result = "" + max(formula.substring(4, colon), endSubstring);
 		else if (!formula.isEmpty()) {
 			try {
 				result = "" + calculate(formula);
@@ -137,6 +175,27 @@ public class Spreadsheet {
 		cells[row][col].setValue("" + result);
 	}
 
+	/**
+	 * Method for calculating the amount of cells with values inside a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The counted cells with values calculated.
+	 */
+	private long counterOfCellsWithValue(String startCellName, String endCellName){
+		long counter = 0;
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++){
+
+			for(int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+				String value = get((row - 1), (col - 'A'));
+
+				if(!value.isEmpty()){
+					counter++;
+				}
+			}
+		}
+		return counter;
+	}
+
 	/**
 	 * Method for calculating the sum of a rectangular block of cells, such as from A1 to B3.
 	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
@@ -144,10 +203,141 @@ public class Spreadsheet {
 	 * @return The sum calculated.
 	 */
 	private long sum(String startCellName, String endCellName) {
-		// TODO implement
+		long result = 0;
 
-		return 0;
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++){
+
+			for(int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+
+				String value = get((row - 1), (col - 'A')); //"-1" because we start with 1 instead of 0. "-A" because A in ascii is 65, but we start with 0
+
+				if(!value.isEmpty()){
+					result += Long.parseLong(value);
 				}
+			}
+		}
+		return result;
+	}
+
+	/**
+	 * Method for calculating the product of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The product calculated.
+	 */
+	private long prod(String startCellName, String endCellName) {
+		long result = 0;
+
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++){
+
+			for(int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+
+				String value = get((row - 1), (col - 'A'));
+				System.out.println(value);
+
+				if(result == 0){
+					result = Long.parseLong(value);
+
+				}
+				else if(!value.isEmpty() && !(value.equals("0"))){
+					result *= Long.parseLong(value);
+				}
+
+			}
+		}
+		return result;
+	}
+
+	/**
+	 * Method for calculating the arithmetic average of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The arithmetic average calculated.
+	 */
+	private long mit(String startCellName, String endCellName) {
+
+		return sum(startCellName, endCellName)/ counterOfCellsWithValue(startCellName, endCellName);
+	}
+
+	/**
+	 * Method for calculating the standard deviation of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The standard deviation calculated.
+	 */
+	private long stabw(String startCellName, String endCellName) {
+		long mean = mit(startCellName, endCellName);
+		long counter = counterOfCellsWithValue(startCellName, endCellName);
+		long result = 0;
+
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++) {
+
+			for (int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+
+				String value = get((row - 1), (col - 'A'));
+
+				if(!value.isEmpty()){
+					result += (long) Math.pow(Long.parseLong(value) - mean, 2);
+				}
+			}
+		}
+		return (long) Math.sqrt(result / counter);
+	}
+
+	/**
+	 * Method for finding the maximum value of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The minimum value of the block.
+	 */
+	private long min(String startCellName, String endCellName) {
+		long result = 0;
+
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++){
+
+			for(int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+
+				String value = get((row - 1), (col - 'A')); //"-1" because we start with 1 instead of 0. "-A" because A in ascii is 65, but we start with 0
+
+				if((col == startCellName.charAt(0)) && (row == Integer.parseInt(startCellName.substring(1)))) {
+					result = Long.parseLong(value);
+				}
+				else if(!value.isEmpty() && (Long.parseLong(value) < result)){
+					result = Long.parseLong(value);
+				}
+			}
+		}
+
+		return result;
+	}
+
+	/**
+	 * Method for finding the maximum value of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The maximum value of the block.
+	 */
+	private long max(String startCellName, String endCellName) {
+		long result = 0;
+
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++){
+
+			for(int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+
+				String value = get((row - 1), (col - 'A')); //"-1" because we start with 1 instead of 0. "-A" because A in ascii is 65, but we start with 0
+
+				if((col == startCellName.charAt(0)) && (row == Integer.parseInt(startCellName.substring(1)))) {
+					result = Long.parseLong(value);
+				}
+				else if(!value.isEmpty() && (Long.parseLong(value) > result)){
+					result = Long.parseLong(value);
+				}
+			}
+		}
+
+		return result;
+	}
+
 
 	/**
 	 * This method calculates the result of a "normal" algebraic expression. It only needs to support
@@ -162,17 +352,47 @@ public class Spreadsheet {
 		Matcher m = Pattern.compile("([A-Z][0-9]*)|[-\\+\\*/]|[0-9]*").matcher(formula);
 
 		long res = 0;
+		char operator = '+';
 
-		// TODO implement
-
-		// uncomment the following to see an example how the elements of a formula can be accessed
-		while (m.find()) {        // m.find() must always be used before m.group()
+		while (m.find()) {
 			String s = m.group();
-			if (!s.isEmpty()) {
-				System.out.println(s);
-			}
+			long value;
+
+			if(s.isEmpty()){
+				continue;
 			}
 
+			if (!(s.matches("[-\\+\\*/]"))) {
+				if(s.matches("[A-Z][0-9]*")) {
+					int col = this.getCol(s);
+					int row = this.getRow(s);
+
+					value = Long.parseLong(cells[row][col].getValue());
+
+				}else{
+					value = Long.parseLong(s);
+				}
+
+				switch(operator) {
+					case '+':
+						res += value;
+						break;
+					case '-':
+						res -= value;
+						break;
+					case '*':
+						res *= value;
+						break;
+					case '/':
+						if (res != 0) {
+							res /= value;
+							break;
+						}
+				}
+			}else{
+				operator = s.charAt(0);
+			}
+		}
 		return res;
 	}
 
@@ -182,7 +402,7 @@ public class Spreadsheet {
 		StringBuilder sb = new StringBuilder();
 
 		sb.append("    ");
-		for (int i = 0; i < cells.length; i++) {
+		for (int i = 0; i < cells[0].length; i++) {
 			sb.append("  " + (char)('A'+ i) + "  | ");
 		}
 

PR1-Spreadsheet.iml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/Axel/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/Test" isTestSource="true" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library" scope="TEST">
+      <library name="JUnit5.8.1">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.8.1/junit-jupiter-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+  </component>
+</module>

Test/de/hs_mannheim/informatik/spreadsheet/SpreadsheetTest.java

@@ -0,0 +1,138 @@
+package de.hs_mannheim.informatik.spreadsheet;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SpreadsheetTest {
+
+    @Test
+    void calculateTheSumOfNumbers(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "=13+6");
+        assertEquals("19", eingabe.get("T5"));
+
+        eingabe.put("T6", "=0+0");
+        assertEquals("0", eingabe.get("T6"));
+
+        eingabe.put("T7", "=22+34");
+        assertEquals("56", eingabe.get("T7"));
+
+        eingabe.put("T8", "= 9 + 3");
+        assertEquals("12", eingabe.get("T8"));
+    }
+
+    @Test
+    void calculateTheDifOfNumbers(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "=13-6");
+        assertEquals("7", eingabe.get("T5"));
+
+        eingabe.put("T6", "=0-0");
+        assertEquals("0", eingabe.get("T6"));
+
+        eingabe.put("T7", "=22-34");
+        assertEquals("-12", eingabe.get("T7"));
+
+        eingabe.put("T8", "= 9 - 3");
+        assertEquals("6", eingabe.get("T8"));
+    }
+
+    @Test
+    void calculateTheProdOfNumbers(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "=13*6");
+        assertEquals("78", eingabe.get("T5"));
+
+        eingabe.put("T6", "=0*0");
+        assertEquals("0", eingabe.get("T6"));
+
+        eingabe.put("T7", "=-2*34");
+        assertEquals("-68", eingabe.get("T7"));
+
+        eingabe.put("T8", "= 9 * 3");
+        assertEquals("27", eingabe.get("T8"));
+    }
+
+    @Test
+    void calculateTheValueOfQuotOfNumbers(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "=12/3");
+        assertEquals("4", eingabe.get("T5"));
+
+        eingabe.put("T6", "=5/0");
+        assertEquals("exc.", eingabe.get("T6"));
+
+        eingabe.put("T7", "= 22 / 2");
+        assertEquals("11", eingabe.get("T7"));
+
+        eingabe.put("T8", "= 0 / 5");
+        assertEquals("0", eingabe.get("T8"));
+    }
+    @Test
+    void calculateTheSumOfRectangular(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "8");
+        eingabe.put("T6", "2");
+        eingabe.put("T7", "30");
+        eingabe.put("T8", "10");
+        eingabe.put("T9", "=Summe(T5:T8)");
+        assertEquals("50", eingabe.get("T9"));
+    }
+
+    void calculateTheSProdOfRectangular(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "2");
+        eingabe.put("T6", "4");
+        eingabe.put("T7", "6");
+        eingabe.put("T8", "10");
+        eingabe.put("T9", "=Produkt(T5:T8)");
+        assertEquals("480", eingabe.get("T9"));
+    }
+    void calculateTheMitOfRectangular(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "8");
+        eingabe.put("T6", "2");
+        eingabe.put("T7", "30");
+        eingabe.put("T8", "10");
+        eingabe.put("T9", "=Mittelwert(T5:T8)");
+        assertEquals("12", eingabe.get("T9"));
+    }
+    void calculateTheStabwOfRectangular(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "8");
+        eingabe.put("T6", "2");
+        eingabe.put("T7", "30");
+        eingabe.put("T8", "10");
+        eingabe.put("T9", "=Stabw(T5:T8)");
+        assertEquals("12", eingabe.get("T9"));
+    }
+    void calculateTheMinOfRectangular(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "8");
+        eingabe.put("T6", "2");
+        eingabe.put("T7", "30");
+        eingabe.put("T8", "10");
+        eingabe.put("T9", "=min(T5:T8)");
+        assertEquals("2", eingabe.get("T9"));
+    }
+    void calculateTheMaxOfRectangular(){
+        Spreadsheet eingabe = new Spreadsheet(99, 26);
+
+        eingabe.put("T5", "8");
+        eingabe.put("T6", "2");
+        eingabe.put("T7", "30");
+        eingabe.put("T8", "10");
+        eingabe.put("T9", "=Summe(T5:T8)");
+        assertEquals("30", eingabe.get("T9"));
+    }
+}