improve

Author: maxxbw

README.md

@@ -29,4 +29,10 @@ Programming toolkit to avoid reinventing the wheel
     	<artifactId>gson</artifactId>
     	<version>2.8.6</version>
 	</dependency>
+	<!-- https://mvnrepository.com/artifact/org.eclipse.jdt/org.eclipse.jdt.core -->
+	<dependency>
+		<groupId>org.eclipse.jdt</groupId>
+		<artifactId>org.eclipse.jdt.core</artifactId>
+		<version>3.24.0</version>
+	</dependency>
 ```

lib/utils/CSVUtil.java

@@ -8,11 +8,14 @@
 
 public class CSVUtil {
 
-	public static void writeLine2Csv(List<String> strList, Path filePath) {
+	public static void writeLine2Csv(List<String> strList, Path filePath, Boolean ifAppendNewLine) {
 		try {
 			FileWriter writer = new FileWriter(filePath.toString());
 
 			String collect = strList.stream().collect(Collectors.joining(","));
+			if (ifAppendNewLine) {
+				collect += "\n";
+			}
 			System.out.println(collect);
 
 			writer.write(collect);
@@ -23,9 +26,12 @@ public static void writeLine2Csv(List<String> strList, Path filePath) {
 		}
 	}
 
-	public static void appendLine2Csv(List<String> strList, Path filePath) {
+	public static void appendLine2Csv(List<String> strList, Path filePath, Boolean ifAppendNewLine) {
 		try {
 			String collect = strList.stream().collect(Collectors.joining(","));
+			if (ifAppendNewLine) {
+				collect += "\n";
+			}
 			// System.out.println(collect);
 
 			// pass true for appending
@@ -85,10 +91,10 @@ public static void write2DArray2Csv(List<List<String>> strList, Path filePath) {
 	 * read csv line by line and parse single line to this function code example
 	 * String csvFile = "/Users/mkyong/csv/country2.csv";
 	 * 
-	 * Scanner scanner = new Scanner(new File(csvFile)); while
-	 * (scanner.hasNext()) { List<String> line = parseLine(scanner.nextLine());
-	 * System.out.println("Country [id= " + line.get(0) + ", code= " +
-	 * line.get(1) + " , name=" + line.get(2) + "]"); } scanner.close();
+	 * Scanner scanner = new Scanner(new File(csvFile)); while (scanner.hasNext()) {
+	 * List<String> line = parseLine(scanner.nextLine());
+	 * System.out.println("Country [id= " + line.get(0) + ", code= " + line.get(1) +
+	 * " , name=" + line.get(2) + "]"); } scanner.close();
 	 * 
 	 * @param cvsLine
 	 * @param separator

lib/utils/CollectionUtil.java

@@ -5,20 +5,30 @@
 public class CollectionUtil {
 
 	/**
-	 * https://stackoverflow.com/a/109389/4315608
-	 *
+	 * https://stackoverflow.com/a/109389/4315608 asc or desc
+	 * 
 	 * @param map
 	 * @param <K>
 	 * @param <V>
 	 * @return
 	 */
-	public static <K, V> Map<K, V> sortByValue(Map<K, V> map) {
+	public static <K, V> Map<K, V> sortByValue(Map<K, V> map, String order) {
+
 		List<Map.Entry<K, V>> list = new LinkedList<>(map.entrySet());
 		Collections.sort(list, new Comparator<Object>() {
 			@SuppressWarnings("unchecked")
 			public int compare(Object o1, Object o2) {
-				return ((Comparable<V>) ((Map.Entry<K, V>) (o1)).getValue())
-						.compareTo(((Map.Entry<K, V>) (o2)).getValue());
+				if (order.equals("asc")) {
+					return ((Comparable<V>) ((Map.Entry<K, V>) (o1)).getValue())
+							.compareTo(((Map.Entry<K, V>) (o2)).getValue());
+				} else if (order.equals("desc")) {
+					return ((Comparable<V>) ((Map.Entry<K, V>) (o2)).getValue())
+							.compareTo(((Map.Entry<K, V>) (o1)).getValue());
+				} else {
+					System.out.println("No such order!");
+					System.exit(0);
+					return 0;
+				}
 			}
 		});
 
@@ -29,6 +39,7 @@ public int compare(Object o1, Object o2) {
 		}
 
 		return result;
+
 	}
 
 	public static Set<Object> mergeMultipleSet(List<Set<Object>> multiSet) {