Lesson_6

proJect/src/main/java/anlov/java/Lesson_6.csv

@@ -0,0 +1,3 @@
+Value 1;Value 2;Value 3
+123;223;54
+52;123;54

proJect/src/main/java/anlov/java/Main.java

@@ -5,5 +5,15 @@
 
 public class Main {
     public static void main(String[] args) {
+
+        String nameOfFile = "Lesson_6.csv";
+
+        String[] header = {"Value 1", "Value 2", "Value 3"};
+        int[][] data = {{123, 223, 54}, {52, 123, 54}};
+
+        Writer writer = new Writer(header, data);
+        writer.saveFile(nameOfFile);
+
+        Reader.reading(nameOfFile);
     }
 }

proJect/src/main/java/anlov/java/Reader.java

@@ -0,0 +1,25 @@
+package anlov.java;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class Reader {
+    private Reader() {
+
+    }
+
+    public static void reading(String file) {
+        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+            String message;
+            while ((message = reader.readLine()) != null) {
+                System.out.println(message);
+            }
+            reader.close();
+            System.out.println("Чтение из файла.");
+        }
+        catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

proJect/src/main/java/anlov/java/Writer.java

@@ -0,0 +1,45 @@
+package anlov.java;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class Writer {
+
+    private String[] header;
+    private int[][] data;
+    private String[][] strings;
+
+    public Writer(String[] header, int[][] data) {
+        this.header = header;
+        this.data = data;
+        convertsIntToString();
+    }
+
+    public void convertsIntToString() {
+        int lengthToData = data.length;
+        strings = new String[lengthToData][data[0].length];
+        for (int i = 0; i < lengthToData; i++) {
+            for (int j = 0; j < data[i].length; j++) {
+                strings[i][j] = String.valueOf(data[i][j]);
+            }
+        }
+    }
+
+    public void saveFile(String fileName) {
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter(fileName))) {
+            writer.write(String.join(";", header));
+            writer.append("\n");
+
+            for (var row : strings) {
+                writer.write(String.join(";", row));
+                writer.append("\n");
+            }
+            writer.close();
+            System.out.println("Файл успешно записан\n");
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}