feat: add random generation instances of class Student

2026-08-25 22:18:22 +07:00
parent 8fa66b10d2
commit 02e14a987a
1 changed files with 25 additions and 0 deletions
@@ -1,11 +1,36 @@
 package ru.project.datasource;

 import ru.project.student.Student;
+import ru.project.student.StudentBuilder;
 import ru.project.collection.MyList;
+import java.util.Random;

 public class RandomDataSource implements  DataSource{
+    private final String CHARS = "АБВГДЕЖХИКЛМНОПРСТУФХЦЧЩЭЮЯ";
+
+    private String getRandomGroupNumber(Random random){
+        StringBuilder buildRes = new StringBuilder(CHARS.charAt(random.nextInt(CHARS.length())));
+        buildRes.append('-');
+        buildRes.append(String.format("%03d", random.nextInt(999)));
+        return buildRes.toString();
+    }
+    private String getRandomRecordBookNumber(Random random){
+        StringBuilder buildRes = new StringBuilder(CHARS.charAt(random.nextInt(CHARS.length())));
+        buildRes.append(String.format("%08d", random.nextInt(99999999)));
+        return buildRes.toString();
+    }
+
    @Override
    public MyList<Student> fill(int size) {
+        Random random = new Random();
+        MyList<Student> result = new MyList<>();
+        for (short i = 0; i<size; i++){
+            result.add(new StudentBuilder()
+                    .setGroupNumber(getRandomGroupNumber(random))
+                    .setAverageGrade(Math.random() * 5.0)
+                    .setRecordBookNumber(getRandomRecordBookNumber(random))
+                    .build());
+        }
        return null;
    }
 }