8QueensProblem code

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package aiproject2;

import static java.lang.System.arraycopy;

/**
 *
 * @author Admin
 */
public class AIProject2 {

    /**
     * @param args the command line arguments
     */
    public static int runs = 100;
    
    public static void main(String[] args) {
            int[] queens = new int[8];
            for(int i = 0; i < 8; i++){
                queens[i] = (int)(Math.random() * 8);
            }
            System.out.println();
            System.out.println("Numerical representation of board:");
            display(queens);
            System.out.println("Visual representation of board:");
            displayBoard(queens);
            System.out.println("Possible attacks: " + numOfAttacks(queens));
            System.out.println();
            System.out.println();
            int[] result = HillClimbing(queens);
            while(numOfAttacks(result) > 0 && runs > 0){
                result = HillClimbing(result);
                runs--;
            }
            System.out.println("Numerical representation of result:");
            display(result);
            System.out.println("Visual representation of result:");
            displayBoard(result);
            System.out.println("Possible attacks: " + numOfAttacks(result));
            System.out.println();
        
        
        
        
        
        
    }
    
    public static int[]  HillClimbing(int[] queens){
        int[] current = new int[8];
        int[] child = new int[8];
        current = queens;
        int[] next = {0,0,0,0,0,0,0,0};
        while(1 == 1){
            int min = 28;

            for(int i = 0; i < 64; i++){
                child = createChild(current,i);
                int attacks = numOfAttacks(child);
                if(attacks < min){
                    min = attacks;
                    arraycopy(child,0,next,0,8);
                    
                }
            }
            if(min >= numOfAttacks(current)){
                return current;
            }
            arraycopy(next,0,current,0,8);
        }
    }
    
    public static int numOfAttacks(int[] arr){
        int row = 0;
        int major = 0;
        int minor = 0;
        
        int[] diagonal = {0,1,2,3,4,5,6,7};
        
        for(int i = 0; i < 8; i++){
            for(int j = 0; j < 8; j++){
                if(arr[i] == arr[j] && i != j){
                    row++;
                }
            }
        }
        
        
        int[] tempMajor = new int[8];
        int[] tempMinor = new int[8];
        arraycopy(arr,0,tempMajor,0,8);
        arraycopy(arr,0,tempMinor,0,8);
        for(int i = 0; i < 8; i++){
            tempMajor[i] -= diagonal[i];
            tempMinor[i] += diagonal[i];
        }
        for(int i = 0; i < 8; i++){
            for(int j = 0; j < 8; j++){
                if(tempMajor[i] == tempMajor[j] && i != j){
                    major++;
                }
                if(tempMinor[i] == tempMinor[j] && i != j){
                    minor++;
                }
            }
        }
        return row + major + minor;
    }
    
    public static int[] createChild(int[] arr, int instance){
        int[] child = new int[8];
        child = arr;
        int col = instance / 8;
        if(child[col] == 7){
            child[col] = 0;
        }
        else{
            child[col] = ++child[col];
        }
        
        return child;
    }
    
    public static void display(int[] arr){
        for(int i = 0; i < arr.length; i++){
            System.out.print(arr[i] + " ");
        }
        System.out.println();
    }
     
    public static void displayBoard(int[] arr){
        
        for(int i = 0; i < 8; i++){
            for(int j = 0; j < 8; j++){
               if(arr[j] == i){
                   System.out.printf("%3s", "Q ");
                }
                else{
                   System.out.printf("%3s", "[]");
                } 
            }
            System.out.println();
        }
    }
    
}