First police of java fifnished

Field.java

-package PACKAGE_NAME;
+import java.util.ArrayList;
+import java.util.Random;
 
+//string to
 public class Field {
+    private int m, n;
+    private String[][] fieldShape;
+    ArrayList<Police> polices;
+    ArrayList<Robber> robberPosotion;
+
+    public Field(int m, int n) {
+        polices = new ArrayList<>();
+        robberPosotion = new ArrayList<>();
+        this.m = m;
+        this.n = n;
+        fieldShape = new String[m][n];
+    }
+
+    public int getM() {
+        return m;
+    }
+
+    public void setM(int m) {
+        this.m = m;
+    }
+
+    public int getN() {
+        return n;
+    }
+
+    public void setN(int n) {
+        this.n = n;
+    }
+
+    public void setFirstPlaceOfPolice(int policeNum) {
+        int tmpX, tmpY, cnt = 0;
+        Random randomGenerator = new Random();
+        for (int i = 0; i < policeNum; i++) {
+            tmpX = randomGenerator.nextInt(m);
+            tmpY = randomGenerator.nextInt(n);
+            if (polices.size() == 0) {
+                Police p = new Police(tmpX, tmpY);
+                fieldShape[tmpX][tmpY] = "P";
+                polices.add(p);
+                System.out.println("First police created");
+            }
+            else {
+                for (Police police : polices) {
+                    if (police.getX() == tmpX && police.getY() == tmpY) {
+                        i--;
+                        cnt++;
+                        break;
+                    }
+                }
+                if (cnt == 0){
+                    Police p = new Police(tmpX, tmpY);
+                    fieldShape[tmpX][tmpY] = "P";
+                    polices.add(p);
+                    System.out.println(i + "th police created");
+                }
+            }
+        }
+    }
 }