Pacman Ghost class, what does this method do?

import java.util.Random;

public class GhostRed {
     
    private int size;
    private int row, col;
    
    //constructor
    public GhostRed(int r, int c, int s) {
        row = r;
        col = c;
        size = s;
         
    }
    
    public int getRow() {
        return row;
    }
    public int getCol() {
        return col;
    }
    public void setRow(int r) {
        row = r;
         
    }
    public void setCol(int c) {
        col = c;
    }
    
    private boolean checkMove(int r, int c) {
        boolean check=true;
        if (r<0 || r > size-1 || c < 0 || c > size-1) {
            check= false;
        }
        return check;
    }
    
    public boolean moveGhost() {
       
        boolean move=true;
        Random r = new Random();
        int newMove = r.nextInt(7); //taking a random number btw 0-7
        
     
        if (newMove == 0) {
            if(checkMove(row-1, col)==false) {
            move=false;
            }
            else{
            row = row-1;
            }
             
        }
        if (newMove == 1) {
            if(checkMove(row+1, col)==false) {
            move= false;
            }
            else{
            row = row+1;
            }
             
        }
        if (newMove == 2) {
            if(checkMove(row, col-1)==false) {
            move= false;
            }else{
            col = col-1;
            }
             
        }
        if (newMove == 3) {
            if(checkMove(row, col+1)==false) {
            move= false;
            }
            else{
            col = col+1;
            }
             
        }
        if (newMove == 4) {
            if(checkMove(row-1, col-1)==false) {
            move= false;
            }
            else{
            row = row-1;
            col = col-1;
            }
             
        }
        if (newMove == 5) {
            if(checkMove(row-1, col+1)==false) {
            move= false;
            }
            else{
            row = row-1;
            col = col+1;
            }
             
        }
        if (newMove == 6) {
            if(checkMove(row+1, col-1)==false) {
            move= false;
            }
            else{
            row = row+1;
            col = col-1;
            }
             
        }
        if (newMove == 7) {
            if(checkMove(row+1, col+1)==false) {
            move= false;
            }else{
            row = row+1;
            col = col+1;
            }
             
        }
         
        return move;
         
         
    }