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pyzhov_egor_lab_3/MatrixProcessing/src/main/java/ru/pyzhov/MatrixProcessing/MatrixService.java

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+package ru.pyzhov.MatrixProcessing;
+
+import org.springframework.stereotype.Service;
+
+import java.util.Arrays;
+
+@Service
+public class MatrixService {
+
+    public int[][] sortByFirstElement(int[][] matrix) {
+        Arrays.sort(matrix, (a, b) -> Integer.compare(b[0], a[0]));
+        return matrix;
+    }
+
+    public void printMatrix(int[][] matrix) {
+        int rowsToPrint = Math.min(matrix.length, 10);
+        int colsToPrint = matrix.length > 0 ? Math.min(matrix[0].length, 10) : 0;
+
+        for (int i = 0; i < rowsToPrint; i++) {
+            for (int j = 0; j < colsToPrint; j++) {
+                System.out.print(matrix[i][j] + " ");
+            }
+            System.out.println();
+        }
+
+    }
+}