Java、四个连续相等的数

        编写下面的方法，测试一个二维数组是否有四个连续相等的数字（水平、垂直、对角线方向都可以）：
        public static boolean isConsecutiveFour(int[][] values)
        编写一个测试程序，提示用户输入一个二维数组的行数、列数以及数组中的值。如果这个数组中有四个连续相等的数组，就显示true；反之显示false。

package pack2;

import java.util.Scanner;

public class ContinuousSameValues {

	public static void main(String[] args) {
		continuousSameValues();
	}

	public static void continuousSameValues() {
		try(Scanner input = new Scanner(System.in);) {
			System.out.print("Enter rows and columns of a array: ");
			int[][] values = new int[input.nextInt()][input.nextInt()];
			
			System.out.println("Enter " + values.length + " rows and " + 
                        values[0].length + " columns: ");
			for (int i = 0; i < values.length; i++) 
				for (int j = 0; j < values[i].length; j++) 
					values[i][j] = input.nextInt();
			
			System.out.println("The array has " + (isConsecutiveFour(values) ? "" : 
                    "not ") + "consecutive four values");
		}
	}
	
	/**判定是否有四个连续相等的数*/
	public static boolean isConsecutiveFour(int[][] values) {
		if(values.length < 4 || values[0].length < 4) return false;
		
		if(isConsecutiveFourInRow(values) || isConsecutiveFourInColumn(values) ||
		   isConsecutiveFourInMajorDiagonal(values) || 
           isConsecutiveFourInSubDiagonal(values))
			return true;
		return false;
	}
	
	/**判定行是否有四个连续相等的数*/
	public static boolean isConsecutiveFourInRow(int[][] values) {
      for (int i = 0 ; i < values.length; i++)
    	  for (int j = 0 ; j < values[i].length - 3; j++)
    		  if ( values[i][j] == values[i][j+1] && values[i][j+1] == values[i][j+2]
                  && values[i][j+2] == values[i][j+3])
    			  return true;
		return false;
	}
	
	/**判定列是否有四个连续相等的数*/
	public static boolean isConsecutiveFourInColumn(int[][] values) {
      for (int j = 0 ; j < values[0].length; j++)
    	  for (int i = 0 ; i < values.length - 3; i++)
    		  if ( values[i][j] == values[i+1][j] && values[i+1][j] == values[i+2][j]
                  && values[i+2][j]== values[i+3][j])
    			  return true;
		return false;
	}
	
	/**判定主对角线是否有四个连续相等的数*/
	public static boolean isConsecutiveFourInMajorDiagonal(int[][] values) {
		for (int i = 0 ; i < values.length - 3; i++)
			for (int j = 0 ; j < values[i].length - 3; j++)
				if (values[i][j] == values[i+1][j+1] && values[i+1][j+1] == 
                    values[i+2][j+2] && values[i+2][j+2] == values[i+3][j+3])
					return true;
		return false;
	}
	
	/**判定次对角线是否有四个连续相等的数*/
	public static boolean isConsecutiveFourInSubDiagonal(int[][] values) {
      for (int i = 3 ; i < values.length; i++)
    	  for (int j = 0 ; j < values[i].length - 3; j++)
    		  if (values[i][j] == values[i-1][j+1] && values[i-1][j+1] == 
                    values[i-2][j+2] && values[i-2][j+2]== values[i-3][j+3])
    			  return true;
		return false;
	}
}