one method removed + add change field method

Field.java

@@ -3,17 +3,19 @@ import java.util.Random;
 
 //string to
 public class Field {
-    private int m, n;
-    private String[][] fieldShape;
-    ArrayList<Police> polices;
-    ArrayList<Robber> robberPosotion;
+    private  int m;
+    private  int n;
+    private ArrayList<Police> polices = new ArrayList<Police>();
+    private Robber Robber;
+    public String[][] fieldShape;
 
     public Field(int m, int n) {
-        polices = new ArrayList<>();
-        robberPosotion = new ArrayList<>();
         this.m = m;
         this.n = n;
         fieldShape = new String[m][n];
+        for (int i = 0; i < m; i++)
+            for (int j = 0; j < n; j++)
+                fieldShape[i][j] = "-";
     }
 
     public int getM() {
@@ -43,8 +45,7 @@ public class Field {
                 fieldShape[tmpX][tmpY] = "P";
                 polices.add(p);
                 System.out.println("First police created");
-            }
-            else {
+            } else {
                 for (Police police : polices) {
                     if (police.getX() == tmpX && police.getY() == tmpY) {
                         i--;
@@ -52,20 +53,19 @@ public class Field {
                         break;
                     }
                 }
-                if (cnt == 0){
+                if (cnt == 0) {
                     Police p = new Police(tmpX, tmpY);
                     fieldShape[tmpX][tmpY] = "P";
                     polices.add(p);
-                    System.out.println(i + "th police created");
                 }
             }
         }
     }
 
-    public void setFirstPlaceOfRobber(){
+    public void setFirstPlaceOfRobber() {
         int tmpX, tmpY, cnt = 0;
 
-        while (true){
+        while (true) {
             Random randomGenerator = new Random();
             tmpX = randomGenerator.nextInt(m);
             tmpY = randomGenerator.nextInt(n);
@@ -75,12 +75,41 @@ public class Field {
                     break;
                 }
             }
-            if (cnt == 0){
-                Robber robber = new Robber();
+            if (cnt == 0) {
+                Robber Robber = new Robber();
                 fieldShape[tmpX][tmpY] = "-";
                 return;
             }
         }
     }
 
+    public void changeField() {
+        for (int i = 0; i < m; i++)
+            for (int j = 0; j < n; j++)
+                fieldShape[i][j] = "-";
+
+        fieldShape[Robber.getX()][Robber.getY()] = "D";
+        boolean b = false;
+        for (Police police : polices) {
+
+            if (fieldShape[police.getX()][police.getY()].equals("D")) {
+                b = true;
+                fieldShape[police.getX()][police.getY()] = "*";
+
+            }
+            if (fieldShape[police.getPreviosX()][police.getPreviosY()].equals("D")) {
+                b = true;
+                fieldShape[police.getX()][police.getY()] = "*";
+
+            }
+            if (!fieldShape[police.getX()][police.getY()].equals("*"))
+                fieldShape[police.getX()][police.getY()] = "P";
+        }
+        if (b == true) {
+            //show field
+            System.exit(0);
+        }
+    }
+
+
 }